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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
// Qt-Security score:significant reason:default
#include "qgnometheme_p.h"
#include <qpa/qplatformdialoghelper.h>
#include <qpa/qplatformfontdatabase.h>
#if QT_CONFIG(dbus) && QT_CONFIG(systemtrayicon)
# include <private/qdbustrayicon_p.h>
#endif
#if QT_CONFIG(dbus)
# include <private/qdbusmenubar_p.h>
#endif
#include <qpa/qwindowsysteminterface.h>
QT_BEGIN_NAMESPACE
/*!
\class QGnomeTheme
\brief QGnomeTheme is a theme implementation for the Gnome desktop.
\since 5.0
\internal
\ingroup qpa
*/
const char *QGnomeTheme::name = "gnome";
QGnomeThemePrivate::QGnomeThemePrivate()
{
#if QT_CONFIG(dbus)
QObject::connect(&m_gnomePortal, &QGnomePortalInterface::themeNameChanged, &m_gnomePortal,
[this](const QString &themeName) { m_themeName = themeName; });
#endif // QT_CONFIG(dbus)
}
QGnomeThemePrivate::~QGnomeThemePrivate()
{
if (systemFont)
delete systemFont;
if (fixedFont)
delete fixedFont;
}
void QGnomeThemePrivate::configureFonts(const QString >kFontName) const
{
Q_ASSERT(!systemFont);
const int split = gtkFontName.lastIndexOf(QChar::Space);
float size = QStringView{gtkFontName}.mid(split + 1).toFloat();
QString fontName = gtkFontName.left(split);
systemFont = new QFont(fontName, size);
fixedFont = new QFont(QLatin1StringView(QGenericUnixTheme::defaultFixedFontNameC), systemFont->pointSize());
fixedFont->setStyleHint(QFont::TypeWriter);
qCDebug(lcQpaFonts) << "default fonts: system" << systemFont << "fixed" << fixedFont;
}
Qt::ColorScheme QGnomeThemePrivate::colorScheme() const
{
if (hasRequestedColorScheme())
return m_requestedColorScheme;
#if QT_CONFIG(dbus)
if (Qt::ColorScheme colorScheme = m_gnomePortal.colorScheme();
colorScheme != Qt::ColorScheme::Unknown)
return colorScheme;
// If the color scheme is set to Unknown by mistake or is not set at all,
// then maybe the theme name contains a hint about the color scheme.
// Let's hope the theme name does not include any accent color name
// which contains "dark" or "light" in it (e.g. lightblue). At the moment they don't.
if (m_themeName.contains(QLatin1StringView("light"), Qt::CaseInsensitive))
return Qt::ColorScheme::Light;
else if (m_themeName.contains(QLatin1StringView("dark"), Qt::CaseInsensitive))
return Qt::ColorScheme::Dark;
#endif // QT_CONFIG(dbus)
// Fallback to Unknown if no color scheme is set or detected
return Qt::ColorScheme::Unknown;
}
bool QGnomeThemePrivate::hasRequestedColorScheme() const
{
return m_requestedColorScheme != Qt::ColorScheme::Unknown;
}
QGnomeTheme::QGnomeTheme()
: QGenericUnixTheme(new QGnomeThemePrivate())
{
#if QT_CONFIG(dbus)
Q_D(QGnomeTheme);
QGnomePortalInterface *portal = &d->m_gnomePortal;
QObject::connect(portal, &QGnomePortalInterface::colorSchemeChanged, portal,
[this](Qt::ColorScheme colorScheme) { updateColorScheme(colorScheme); });
QObject::connect(portal, &QGnomePortalInterface::contrastChanged, portal,
[this](Qt::ContrastPreference contrast) { updateHighContrast(contrast); });
QObject::connect(portal, &QGnomePortalInterface::motionChanged, portal,
[this](Qt::MotionPreference motion){ updateReducedMotion(motion); });
#endif // QT_CONFIG(dbus)
}
QVariant QGnomeTheme::themeHint(QPlatformTheme::ThemeHint hint) const
{
switch (hint) {
case QPlatformTheme::DialogButtonBoxButtonsHaveIcons:
return QVariant(true);
case QPlatformTheme::DialogButtonBoxLayout:
return QVariant(QPlatformDialogHelper::GnomeLayout);
case QPlatformTheme::SystemIconThemeName:
return QVariant(QStringLiteral("Adwaita"));
case QPlatformTheme::SystemIconFallbackThemeName:
return QVariant(QStringLiteral("gnome"));
case QPlatformTheme::IconThemeSearchPaths:
return QVariant(xdgIconThemePaths());
case QPlatformTheme::IconPixmapSizes:
return QVariant::fromValue(availableXdgFileIconSizes());
case QPlatformTheme::StyleNames: {
QStringList styleNames;
styleNames << QStringLiteral("Fusion") << QStringLiteral("windows");
return QVariant(styleNames);
}
case QPlatformTheme::KeyboardScheme:
return QVariant(int(GnomeKeyboardScheme));
case QPlatformTheme::PasswordMaskCharacter:
return QVariant(QChar(0x2022));
case QPlatformTheme::UiEffects:
return QVariant(int(HoverEffect));
case QPlatformTheme::ButtonPressKeys:
return QVariant::fromValue(
QList<Qt::Key>({ Qt::Key_Space, Qt::Key_Return, Qt::Key_Enter, Qt::Key_Select }));
case QPlatformTheme::PreselectFirstFileInDirectory:
return true;
case QPlatformTheme::MouseCursorTheme:
return QVariant(mouseCursorTheme());
case QPlatformTheme::MouseCursorSize:
return QVariant(mouseCursorSize());
case QPlatformTheme::PreferFileIconFromTheme:
return true;
default:
break;
}
return QPlatformTheme::themeHint(hint);
}
QIcon QGnomeTheme::fileIcon(const QFileInfo &fileInfo, QPlatformTheme::IconOptions) const
{
#if QT_CONFIG(mimetype)
return xdgFileIcon(fileInfo);
#else
Q_UNUSED(fileInfo);
return QIcon();
#endif
}
const QFont *QGnomeTheme::font(Font type) const
{
Q_D(const QGnomeTheme);
if (!d->systemFont)
d->configureFonts(gtkFontName());
switch (type) {
case QPlatformTheme::SystemFont:
return d->systemFont;
case QPlatformTheme::FixedFont:
return d->fixedFont;
default:
return nullptr;
}
}
QString QGnomeTheme::gtkFontName() const
{
return QStringLiteral("%1 %2").arg(QLatin1StringView(defaultSystemFontNameC))
.arg(defaultSystemFontSize);
}
void QGnomeTheme::requestColorScheme(Qt::ColorScheme scheme)
{
Q_D(QGnomeTheme);
if (d->m_requestedColorScheme == scheme)
return;
QPlatformTheme::requestColorScheme(scheme);
d->m_requestedColorScheme = scheme;
QWindowSystemInterface::handleThemeChange();
}
Qt::ColorScheme QGnomeTheme::colorScheme() const
{
Q_D(const QGnomeTheme);
if (auto colorScheme = d->colorScheme(); colorScheme != Qt::ColorScheme::Unknown)
return colorScheme;
// If the color scheme is not set or detected, fall back to the default
return QPlatformTheme::colorScheme();
}
#if QT_CONFIG(dbus)
void QGnomeTheme::updateColorScheme(Qt::ColorScheme colorScheme)
{
Q_UNUSED(colorScheme);
QWindowSystemInterface::handleThemeChange();
}
void QGnomeTheme::updateHighContrast(Qt::ContrastPreference contrast)
{
Q_UNUSED(contrast);
QWindowSystemInterface::handleThemeChange();
}
void QGnomeTheme::updateReducedMotion(Qt::MotionPreference motion)
{
Q_UNUSED(motion);
QWindowSystemInterface::handleThemeChange();
}
QPlatformMenuBar *QGnomeTheme::createPlatformMenuBar() const
{
if (isDBusGlobalMenuAvailable())
return new QDBusMenuBar();
return nullptr;
}
Qt::ContrastPreference QGnomeTheme::contrastPreference() const
{
Q_D(const QGnomeTheme);
return d->m_gnomePortal.contrastPreference();
}
Qt::MotionPreference QGnomeTheme::motionPreference() const
{
Q_D(const QGnomeTheme);
return d->m_gnomePortal.motionPreference();
}
# if QT_CONFIG(systemtrayicon)
QPlatformSystemTrayIcon *QGnomeTheme::createPlatformSystemTrayIcon() const
{
if (shouldUseDBusTray())
return new QDBusTrayIcon();
return nullptr;
}
# endif // QT_CONFIG(systemtrayicon)
#endif // QT_CONFIG(dbus)
QString QGnomeTheme::standardButtonText(int button) const
{
switch (button) {
case QPlatformDialogHelper::Ok:
return QCoreApplication::translate("QGnomeTheme", "&OK");
case QPlatformDialogHelper::Save:
return QCoreApplication::translate("QGnomeTheme", "&Save");
case QPlatformDialogHelper::Cancel:
return QCoreApplication::translate("QGnomeTheme", "&Cancel");
case QPlatformDialogHelper::Close:
return QCoreApplication::translate("QGnomeTheme", "&Close");
case QPlatformDialogHelper::Discard:
return QCoreApplication::translate("QGnomeTheme", "Close without Saving");
default:
break;
}
return QPlatformTheme::standardButtonText(button);
}
QT_END_NAMESPACE