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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qgnomeportalinterface_p.h"
#include "qdbussettings_p.h"
#include <private/qdbusplatformmenu_p.h>
#include <QtDBus/QDBusMessage>
#include <QtDBus/QDBusPendingCall>
#include <QtDBus/QDBusReply>
#include <QtDBus/QDBusVariant>
QT_BEGIN_NAMESPACE
#if QT_CONFIG(dbus)
Q_STATIC_LOGGING_CATEGORY(lcQpaThemeGnome, "qt.qpa.theme.gnome")
#endif // QT_CONFIG(dbus)
using namespace Qt::StringLiterals;
QGnomePortalInterface::QGnomePortalInterface(QObject *parent)
: QObject(parent), m_dbus{ new QDBusListener }
{
QObject::connect(m_dbus.get(), &QDBusListener::settingChanged, this,
&QGnomePortalInterface::dbusSettingChanged);
querySettings();
}
/*!
\internal
\brief QGnomePortalInterface::colorScheme
This is a getter method for the color-scheme loaded from the DBus portal.
\param fallback indicates the fallback color-scheme.
\return returns the cached color-scheme. If the color-scheme was not loaded
it returns the \a fallback color-scheme.
*/
Qt::ColorScheme QGnomePortalInterface::colorScheme(Qt::ColorScheme fallback) const
{
if (!m_colorScheme.has_value())
return fallback;
return m_colorScheme.value();
}
/*!
\internal
\brief QGnomePortalInterface::contrastPreference
This is a getter method for the contrast-preference loaded from the DBus portal.
\param fallback indicates the fallback contrast-preference.
\return returns the cached contrast-preference if it was loaded. Otherwise,
returns the \a fallback contrast-preference.
*/
Qt::ContrastPreference
QGnomePortalInterface::contrastPreference(Qt::ContrastPreference fallback) const
{
if (!m_contrast.has_value())
return fallback;
return m_contrast.value();
}
void QGnomePortalInterface::querySettings()
{
QDBusConnection dbus = QDBusConnection::sessionBus();
if (!dbus.isConnected()) {
qCWarning(lcQpaThemeGnome) << "dbus connection failed. Last error: " << dbus.lastError();
return;
}
constexpr auto method = "ReadAll"_L1;
auto message = QDBusMessage::createMethodCall(s_service, s_path, s_interface, method);
message << QStringList{ QDBusSettings::XdgSettings::AppearanceNamespace,
QDBusSettings::GnomeSettings::AllyNamespace };
QDBusPendingCall pendingCall = dbus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pendingCall, this);
auto onWatcherFinished = [&](QDBusPendingCallWatcher *watcher) {
const QDBusMessage reply = watcher->reply();
if (QDBusMessage::ErrorMessage == reply.type()) {
qCWarning(lcQpaThemeGnome)
<< "dbus reply error: [" << reply.errorName() << "]" << reply.errorMessage();
watcher->deleteLater();
return;
}
const auto convertXdgColorScheme = [](const QVariant &value) {
using namespace QDBusSettings::XdgSettings;
return QVariant::fromValue(convertColorScheme(value));
};
constexpr auto XdgContrastKey = QDBusSettings::XdgSettings::ContrastKey;
const auto convertXdgContrast = [](const QVariant &value) {
using namespace QDBusSettings::XdgSettings;
return QVariant::fromValue(convertContrastPreference(value));
};
constexpr auto GnomeContrastKey = QDBusSettings::GnomeSettings::ContrastKey;
const auto convrtGnomeContrast = [](const QVariant &value) {
using namespace QDBusSettings::GnomeSettings;
return QVariant::fromValue(convertContrastPreference(value));
};
const QVariantList &args = reply.arguments();
for (const QVariant &arg_ : args) {
const QMap<QString, QVariantMap> arg = qdbus_cast<QMap<QString, QVariantMap>>(arg_);
for (auto aIt = arg.begin(); aIt != arg.end(); ++aIt) {
const QString &namespace_ = aIt.key();
const QVariantMap &settings = aIt.value();
for (auto sIt = settings.begin(); sIt != settings.end(); ++sIt) {
const QString &key = sIt.key();
const QVariant &value = sIt.value();
if ((key == QDBusSettings::XdgSettings::ColorSchemeKey)
&& (namespace_ == QDBusSettings::XdgSettings::AppearanceNamespace))
dbusSettingChanged(QDBusListener::Provider::Gnome,
QDBusListener::Setting::ColorScheme,
convertXdgColorScheme(value));
else if ((key == XdgContrastKey)
&& (namespace_ == QDBusSettings::XdgSettings::AppearanceNamespace))
dbusSettingChanged(QDBusListener::Provider::Gnome,
QDBusListener::Setting::Contrast,
convertXdgContrast(value));
else if ((key == GnomeContrastKey)
&& (namespace_ == QDBusSettings::GnomeSettings::AllyNamespace))
dbusSettingChanged(QDBusListener::Provider::Gnome,
QDBusListener::Setting::Contrast,
convrtGnomeContrast(value));
}
}
}
watcher->deleteLater();
};
connect(watcher, &QDBusPendingCallWatcher::finished, this, onWatcherFinished);
}
void QGnomePortalInterface::updateColorScheme(Qt::ColorScheme colorScheme)
{
if (m_colorScheme.has_value() && (m_colorScheme.value() == colorScheme))
return;
m_colorScheme = colorScheme;
emit colorSchemeChanged(colorScheme);
}
void QGnomePortalInterface::updateContrast(Qt::ContrastPreference contrast)
{
if (m_contrast.has_value() && (m_contrast.value() == contrast))
return;
m_contrast = contrast;
emit contrastChanged(contrast);
}
void QGnomePortalInterface::dbusSettingChanged(QDBusListener::Provider provider,
QDBusListener::Setting setting,
const QVariant &value)
{
if (provider != QDBusListener::Provider::Gnome && provider != QDBusListener::Provider::Gtk)
return;
switch (setting) {
case QDBusListener::Setting::ColorScheme:
updateColorScheme(value.value<Qt::ColorScheme>());
break;
case QDBusListener::Setting::Contrast:
updateContrast(value.value<Qt::ContrastPreference>());
break;
case QDBusListener::Setting::Theme:
emit themeNameChanged(value.toString());
break;
default:
break;
}
}
QT_END_NAMESPACE
#include "moc_qgnomeportalinterface_p.cpp"
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