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Seed lockscreen wallpaper defaults at startup

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When kscreenlockerrc has no greeter wallpaper configured, or still
points at the legacy Next wallpaper, the lockscreen falls back to KDE
default imagery. Seed the greeter wallpaper settings from the installed
SHIFT wallpaper package during Plasma Mobile startup so the lockscreen
uses the fork default consistently.

Link ConfigCore for the startup module so it can read and update
kscreenlockerrc.
This commit is contained in:
Marco Allegretti 2026-05-05 09:06:46 +02:00
parent 462ceddd66
commit ed2fc8301b
2 changed files with 61 additions and 0 deletions
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1
kded/start/CMakeLists.txt
View file

@ -10,6 +10,7 @@ kcoreaddons_add_plugin(kded_plasma_mobile_start SOURCES ${kded_plasma_mobile_sta
target_link_libraries(kded_plasma_mobile_start PRIVATE
Qt::Core
KF6::DBusAddons
KF6::ConfigCore
KF6::KIOGui
KF6::JobWidgets
KF6::Package

60
kded/start/start.cpp
View file

@ -1,17 +1,77 @@
// SPDX-FileCopyrightText: 2023 Devin Lin <devin@kde.org>
// SPDX-License-Identifier: GPL-2.0-or-later
#include <QFileInfo>
#include <QStandardPaths>
#include <QUrl>
#include <KConfigGroup>
#include <KIO/CommandLauncherJob>
#include <KNotificationJobUiDelegate>
#include <KPluginFactory>
#include <KSharedConfig>
#include "start.h"
namespace
{
bool isLegacyNextWallpaperPath(const QString &path)
{
return path == QStringLiteral("Next") || path.startsWith(QStringLiteral("/usr/share/wallpapers/Next/"))
|| path.startsWith(QStringLiteral("file:///usr/share/wallpapers/Next/"));
}
QString shiftWallpaperPackageUrl()
{
const QString metadataPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("wallpapers/SHIFT/metadata.json"));
if (metadataPath.isEmpty()) {
return QString();
}
QString packageUrl = QUrl::fromLocalFile(QFileInfo(metadataPath).absolutePath()).toString();
if (!packageUrl.endsWith(QLatin1Char('/'))) {
packageUrl += QLatin1Char('/');
}
return packageUrl;
}
void ensureLockscreenWallpaperDefaults()
{
auto config = KSharedConfig::openConfig(QStringLiteral("kscreenlockerrc"));
auto greeterGroup = config->group(QStringLiteral("Greeter"));
const QString wallpaperPlugin = greeterGroup.readEntry(QStringLiteral("WallpaperPlugin"), QString());
const QString wallpaperPath =
greeterGroup.group(QStringLiteral("Wallpaper")).group(wallpaperPlugin).group(QStringLiteral("General")).readEntry(QStringLiteral("Image"), QString());
const bool wallpaperUnset = wallpaperPlugin.isEmpty() || wallpaperPath.isEmpty();
const bool wallpaperLegacyNext = wallpaperPlugin == QStringLiteral("org.kde.image") && isLegacyNextWallpaperPath(wallpaperPath);
if (!wallpaperUnset && !wallpaperLegacyNext) {
return;
}
const QString defaultWallpaperUrl = shiftWallpaperPackageUrl();
if (defaultWallpaperUrl.isEmpty()) {
qWarning() << "Could not locate SHIFT wallpaper package for lockscreen defaults";
return;
}
greeterGroup.group(QStringLiteral("Wallpaper"))
.group(QStringLiteral("org.kde.image"))
.group(QStringLiteral("General"))
.writeEntry(QStringLiteral("Image"), defaultWallpaperUrl, KConfigGroup::Notify);
greeterGroup.writeEntry(QStringLiteral("WallpaperPlugin"), QStringLiteral("org.kde.image"), KConfigGroup::Notify);
config->sync();
}
}
K_PLUGIN_FACTORY_WITH_JSON(StartFactory, "kded_plasma_mobile_start.json", registerPlugin<Start>();)
Start::Start(QObject *parent, const QList<QVariant> &)
: KDEDModule{parent}
{
ensureLockscreenWallpaperDefaults();
auto *envmanagerJob = new KIO::CommandLauncherJob(QStringLiteral("plasma-mobile-envmanager --apply-settings"), {});
envmanagerJob->setUiDelegate(new KNotificationJobUiDelegate(KJobUiDelegate::AutoErrorHandlingEnabled));
envmanagerJob->setDesktopName(QStringLiteral("org.kde.plasma-mobile-envmanager"));