107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
#include "util/portal.hpp"
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#include <giomm/dbusproxy.h>
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#include <glibmm/variant.h>
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#include <spdlog/spdlog.h>
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#include <iostream>
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#include <string>
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#include "fmt/format.h"
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namespace waybar {
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static constexpr const char* PORTAL_BUS_NAME = "org.freedesktop.portal.Desktop";
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static constexpr const char* PORTAL_OBJ_PATH = "/org/freedesktop/portal/desktop";
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static constexpr const char* PORTAL_INTERFACE = "org.freedesktop.portal.Settings";
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static constexpr const char* PORTAL_NAMESPACE = "org.freedesktop.appearance";
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static constexpr const char* PORTAL_KEY = "color-scheme";
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} // namespace waybar
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using namespace Gio;
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auto fmt::formatter<waybar::Appearance>::format(waybar::Appearance c, format_context& ctx) const {
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string_view name;
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switch (c) {
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case waybar::Appearance::LIGHT:
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name = "light";
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break;
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case waybar::Appearance::DARK:
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name = "dark";
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break;
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default:
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name = "unknown";
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break;
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}
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return formatter<string_view>::format(name, ctx);
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}
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waybar::Portal::Portal()
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: DBus::Proxy(DBus::Connection::get_sync(DBus::BusType::BUS_TYPE_SESSION), PORTAL_BUS_NAME,
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PORTAL_OBJ_PATH, PORTAL_INTERFACE),
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currentMode(Appearance::UNKNOWN) {
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refreshAppearance();
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};
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void waybar::Portal::refreshAppearance() {
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auto params = Glib::Variant<std::tuple<Glib::ustring, Glib::ustring>>::create(
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{PORTAL_NAMESPACE, PORTAL_KEY});
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Glib::VariantBase response;
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try {
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response = call_sync(std::string(PORTAL_INTERFACE) + ".Read", params);
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} catch (const Glib::Error& e) {
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spdlog::info("Unable to receive desktop appearance: {}", std::string(e.what()));
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return;
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}
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// unfortunately, the response is triple-nested, with type (v<v<uint32_t>>),
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// so we have cast thrice. This is a variation from the freedesktop standard
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// (it should only be doubly nested) but all implementations appear to do so.
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//
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// xdg-desktop-portal 1.17 will fix this issue with a new `ReadOne` method,
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// but this version is not yet released.
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// TODO(xdg-desktop-portal v1.17): switch to ReadOne
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auto container = Glib::VariantBase::cast_dynamic<Glib::VariantContainerBase>(response);
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Glib::VariantBase modev;
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container.get_child(modev, 0);
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auto mode =
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Glib::VariantBase::cast_dynamic<Glib::Variant<Glib::Variant<Glib::Variant<uint32_t>>>>(modev)
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.get()
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.get()
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.get();
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auto newMode = Appearance(mode);
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if (newMode == currentMode) {
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return;
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}
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spdlog::info("Discovered appearance '{}'", newMode);
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currentMode = newMode;
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m_signal_appearance_changed.emit(currentMode);
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}
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waybar::Appearance waybar::Portal::getAppearance() { return currentMode; };
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void waybar::Portal::on_signal(const Glib::ustring& sender_name, const Glib::ustring& signal_name,
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const Glib::VariantContainerBase& parameters) {
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spdlog::debug("Received signal {}", (std::string)signal_name);
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if (signal_name != "SettingChanged" || parameters.get_n_children() != 3) {
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return;
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}
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Glib::VariantBase nspcv, keyv, valuev;
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parameters.get_child(nspcv, 0);
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parameters.get_child(keyv, 1);
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parameters.get_child(valuev, 2);
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auto nspc = Glib::VariantBase::cast_dynamic<Glib::Variant<std::string>>(nspcv).get();
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auto key = Glib::VariantBase::cast_dynamic<Glib::Variant<std::string>>(keyv).get();
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if (nspc != PORTAL_NAMESPACE || key != PORTAL_KEY) {
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return;
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}
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auto value =
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Glib::VariantBase::cast_dynamic<Glib::Variant<Glib::Variant<uint32_t>>>(valuev).get().get();
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auto newMode = Appearance(value);
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if (newMode == currentMode) {
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return;
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}
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spdlog::info("Received new appearance '{}'", newMode);
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currentMode = newMode;
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m_signal_appearance_changed.emit(currentMode);
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}
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