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| 1 | +#include <iostream> |
| 2 | +#include <string> |
| 3 | +#include <giomm/dbusproxy.h> |
| 4 | +#include <glibmm/variant.h> |
| 5 | +#include <spdlog/spdlog.h> |
| 6 | + |
| 7 | +#include "util/portal.hpp" |
| 8 | +#include "fmt/format.h" |
| 9 | + |
| 10 | +namespace waybar { |
| 11 | +static constexpr const char* PORTAL_BUS_NAME = |
| 12 | + "org.freedesktop.portal.Desktop"; |
| 13 | +static constexpr const char* PORTAL_OBJ_PATH = |
| 14 | + "/org/freedesktop/portal/desktop"; |
| 15 | +static constexpr const char* PORTAL_INTERFACE = |
| 16 | + "org.freedesktop.portal.Settings"; |
| 17 | +static constexpr const char* PORTAL_NAMESPACE = |
| 18 | + "org.freedesktop.appearance"; |
| 19 | +static constexpr const char* PORTAL_KEY = "color-scheme"; |
| 20 | +} // waybar |
| 21 | + |
| 22 | +using namespace Gio; |
| 23 | + |
| 24 | + |
| 25 | +auto fmt::formatter<waybar::Appearance>::format(waybar::Appearance c, format_context& ctx) const { |
| 26 | + string_view name; |
| 27 | + switch (c) { |
| 28 | + case waybar::Appearance::LIGHT: name = "light"; break; |
| 29 | + case waybar::Appearance::DARK: name = "dark"; break; |
| 30 | + default: name = "unknown"; break; |
| 31 | + } |
| 32 | + return formatter<string_view>::format(name, ctx); |
| 33 | +} |
| 34 | + |
| 35 | +waybar::Portal::Portal() : |
| 36 | + DBus::Proxy(DBus::Connection::get_sync(DBus::BusType::BUS_TYPE_SESSION), |
| 37 | + PORTAL_BUS_NAME, |
| 38 | + PORTAL_OBJ_PATH, |
| 39 | + PORTAL_INTERFACE), |
| 40 | + currentMode(Appearance::UNKNOWN) { |
| 41 | + refreshAppearance(); |
| 42 | +}; |
| 43 | + |
| 44 | +void waybar::Portal::refreshAppearance() { |
| 45 | + auto params = Glib::Variant<std::tuple<Glib::ustring,Glib::ustring>>::create( |
| 46 | + {PORTAL_NAMESPACE,PORTAL_KEY} |
| 47 | + ); |
| 48 | + Glib::VariantBase response; |
| 49 | + try { |
| 50 | + response = call_sync( |
| 51 | + std::string(PORTAL_INTERFACE) + ".Read", |
| 52 | + params |
| 53 | + ); |
| 54 | + } catch (const Glib::Error& e) { |
| 55 | + spdlog::info("Unable to receive desktop appearance: {}", std::string(e.what())); |
| 56 | + return; |
| 57 | + } |
| 58 | + |
| 59 | + // unfortunately, the response is triple-nested, with type (v<v<uint32_t>>), |
| 60 | + // so we have cast thrice. This is a variation from the freedesktop standard |
| 61 | + // (it should only be doubly nested) but all implementations appear to do so. |
| 62 | + // |
| 63 | + // xdg-desktop-portal 1.17 will fix this issue with a new `ReadOne` method, |
| 64 | + // but this version is not yet released. |
| 65 | + // TODO(xdg-desktop-portal v1.17): switch to ReadOne |
| 66 | + auto container = Glib::VariantBase::cast_dynamic<Glib::VariantContainerBase>(response); |
| 67 | + Glib::VariantBase modev; |
| 68 | + container.get_child(modev, 0); |
| 69 | + auto mode = Glib::VariantBase::cast_dynamic< |
| 70 | + Glib::Variant<Glib::Variant<Glib::Variant<uint32_t>>> |
| 71 | + >(modev).get().get().get(); |
| 72 | + auto newMode = Appearance(mode); |
| 73 | + if (newMode == currentMode) { |
| 74 | + return; |
| 75 | + } |
| 76 | + spdlog::info("Discovered appearance '{}'", newMode); |
| 77 | + currentMode = newMode; |
| 78 | + m_signal_appearance_changed.emit(currentMode); |
| 79 | +} |
| 80 | + |
| 81 | +waybar::Appearance waybar::Portal::getAppearance() { |
| 82 | + return currentMode; |
| 83 | +}; |
| 84 | + |
| 85 | +void waybar::Portal::on_signal (const Glib::ustring& sender_name, |
| 86 | + const Glib::ustring& signal_name, |
| 87 | + const Glib::VariantContainerBase& parameters) { |
| 88 | + spdlog::debug("Received signal {}", (std::string)signal_name); |
| 89 | + if (signal_name != "SettingChanged" || parameters.get_n_children() != 3) { |
| 90 | + return; |
| 91 | + } |
| 92 | + Glib::VariantBase nspcv, keyv, valuev; |
| 93 | + parameters.get_child(nspcv, 0); |
| 94 | + parameters.get_child(keyv, 1); |
| 95 | + parameters.get_child(valuev, 2); |
| 96 | + auto nspc = |
| 97 | + Glib::VariantBase::cast_dynamic<Glib::Variant<std::string>>(nspcv).get(); |
| 98 | + auto key = |
| 99 | + Glib::VariantBase::cast_dynamic<Glib::Variant<std::string>>(keyv).get(); |
| 100 | + if (nspc != PORTAL_NAMESPACE || key != PORTAL_KEY) { |
| 101 | + return; |
| 102 | + } |
| 103 | + auto value = Glib::VariantBase::cast_dynamic< |
| 104 | + Glib::Variant<Glib::Variant<uint32_t>> |
| 105 | + >(valuev).get().get(); |
| 106 | + auto newMode = Appearance(value); |
| 107 | + if (newMode == currentMode) { |
| 108 | + return; |
| 109 | + } |
| 110 | + spdlog::info("Received new appearance '{}'", newMode); |
| 111 | + currentMode = newMode; |
| 112 | + m_signal_appearance_changed.emit(currentMode); |
| 113 | +} |
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