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Bring Windows XP themes to your KDE Plasma environment!
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189// SPDX-License-Identifier: GPL-3.0-or-later#include "app/session.h"
#include <QDBusConnection>#include <QDBusMessage>#include <QDBusReply>#include <QElapsedTimer>#include <QFile>#include <QProcess>#include <QThread>
#include <unistd.h>
namespace xpl {
namespace {QStringList groupArgs(const QStringList &groups){ QStringList args; for (const QString &g : groups) args << QStringLiteral("--group") << g; return args;}} // namespace
bool Session::writeConfig(const QString &file, const QStringList &groups, const QString &key, const QString &value, bool notify){ QStringList argv{QStringLiteral("kwriteconfig6")}; if (notify) argv << QStringLiteral("--notify"); argv << QStringLiteral("--file") << file << groupArgs(groups) << QStringLiteral("--key") << key << value; return run(argv).ok();}
bool Session::deleteConfig(const QString &file, const QStringList &groups, const QString &key, bool notify){ QStringList argv{QStringLiteral("kwriteconfig6")}; if (notify) argv << QStringLiteral("--notify"); argv << QStringLiteral("--file") << file << groupArgs(groups) << QStringLiteral("--key") << key << QStringLiteral("--delete"); return run(argv).ok();}
QString Session::readConfig(const QString &file, const QStringList &groups, const QString &key){ return QString::fromUtf8(run(QStringList{QStringLiteral("kreadconfig6"), QStringLiteral("--file"), file} + groupArgs(groups) + QStringList{QStringLiteral("--key"), key}) .out) .trimmed();}
void Session::reconfigureKWin(){ call(QStringLiteral("org.kde.KWin"), QStringLiteral("/KWin"), QStringLiteral("org.kde.KWin"), QStringLiteral("reconfigure"));}
bool Session::waitForPlasmaShell(int ms){ // Until its scripting interface answers (it takes a few seconds). QElapsedTimer clock; clock.start(); while (clock.elapsed() < ms) { if (script(QStringLiteral("print('up')")).value_or(QString()) == QLatin1String("up")) return true; QThread::msleep(500); } return false;}
void Session::restartPlasmaShell(const std::function<void()> &whileStopped){ const QString unit = QStringLiteral("plasma-plasmashell.service"); const bool systemd = QString::fromUtf8(run({QStringLiteral("systemctl"), QStringLiteral("--user"), QStringLiteral("show"), unit, QStringLiteral("-p"), QStringLiteral("LoadState"), QStringLiteral("--value")}).out) .trimmed() == QLatin1String("loaded"); // A shell still starting -- restarted a moment ago by something else, // plasma-apply-lookandfeel for one -- can hang on its way out (Plasma // 6.6's Wayland clipboard) till systemd aborts it: up first, then down. const bool running = systemd ? QString::fromUtf8(run({QStringLiteral("systemctl"), QStringLiteral("--user"), QStringLiteral("is-active"), unit}).out).trimmed().startsWith(QLatin1String("activ")) : run({QStringLiteral("pgrep"), QStringLiteral("-u"), QString::number(getuid()), QStringLiteral("-x"), QStringLiteral("plasmashell")}).ok(); if (running) waitForPlasmaShell(); // (Without systemd, the new shell is started from here -- in the old // one's environment, the session's, whatever this program was run from.) QStringList sessionEnv; if (systemd) { run({QStringLiteral("systemctl"), QStringLiteral("--user"), QStringLiteral("stop"), unit}); } else { const QString pid = QString::fromUtf8(run({QStringLiteral("pgrep"), QStringLiteral("-u"), QString::number(getuid()), QStringLiteral("-x"), QStringLiteral("plasmashell")}).out).section(QLatin1Char('\n'), 0, 0).trimmed(); if (QFile environ(QStringLiteral("/proc/%1/environ").arg(pid)); !pid.isEmpty() && environ.open(QIODevice::ReadOnly)) for (const QByteArray &line : environ.readAll().split('\0')) if (line.contains('=')) sessionEnv << QString::fromLocal8Bit(line); // (kquitapp6 asks it to quit and waits till it has) run({QStringLiteral("kquitapp6"), QStringLiteral("plasmashell")}); } if (whileStopped) whileStopped(); if (systemd) { // (systemd allows the unit 3 starts a minute, and an apply and a reset // -- each restarting it, plasma-apply-lookandfeel too -- can need more) run({QStringLiteral("systemctl"), QStringLiteral("--user"), QStringLiteral("reset-failed"), unit}); run({QStringLiteral("systemctl"), QStringLiteral("--user"), QStringLiteral("start"), unit}); } else { startDetached({QStringLiteral("plasmashell")}, sessionEnv); } waitForPlasmaShell();}
host::Result LiveSession::run(const QStringList &argv){ return host::run(argv);}
bool LiveSession::startDetached(const QStringList &argv, const QStringList &environment){ if (argv.isEmpty()) return false; QProcess process; process.setProgram(argv.first()); process.setArguments(argv.mid(1)); QProcessEnvironment env = QProcessEnvironment::systemEnvironment(); if (!environment.isEmpty()) { env.clear(); for (const QString &line : environment) env.insert(line.section(QLatin1Char('='), 0, 0), line.section(QLatin1Char('='), 1)); const QByteArray plugins = qgetenv("QT_PLUGIN_PATH"); if (plugins.isEmpty()) env.remove(QStringLiteral("QT_PLUGIN_PATH")); else env.insert(QStringLiteral("QT_PLUGIN_PATH"), QString::fromLocal8Bit(plugins)); } // (Never the offscreen platform the command line runs in, main.cpp: // not for a program started for the desktop.) if (env.value(QStringLiteral("QT_QPA_PLATFORM")) == QLatin1String("offscreen")) env.remove(QStringLiteral("QT_QPA_PLATFORM")); process.setProcessEnvironment(env); // (and none of this program's output: a detached program holding it // open keeps whatever reads it -- a terminal's pipe, SSH -- waiting) process.setStandardInputFile(QProcess::nullDevice()); process.setStandardOutputFile(QProcess::nullDevice()); process.setStandardErrorFile(QProcess::nullDevice()); return process.startDetached();}
std::optional<QString> LiveSession::script(const QString &js, QString *error){ QDBusMessage message = QDBusMessage::createMethodCall(QStringLiteral("org.kde.plasmashell"), QStringLiteral("/PlasmaShell"), QStringLiteral("org.kde.PlasmaShell"), QStringLiteral("evaluateScript")); message << js; const QDBusReply<QString> reply = QDBusConnection::sessionBus().call(message, QDBus::Block, 60000); if (!reply.isValid()) { if (error) *error = reply.error().message(); return std::nullopt; } return reply.value().trimmed();}
bool LiveSession::call(const QString &service, const QString &path, const QString &interface, const QString &method, const QVariantList &arguments){ QDBusMessage message = QDBusMessage::createMethodCall(service, path, interface, method); message.setArguments(arguments); return QDBusConnection::sessionBus().call(message, QDBus::Block, 30000).type() != QDBusMessage::ErrorMessage;}
std::optional<QVariant> LiveSession::query(const QString &service, const QString &path, const QString &interface, const QString &method, const QVariantList &arguments){ QDBusMessage message = QDBusMessage::createMethodCall(service, path, interface, method); message.setArguments(arguments); const QDBusMessage reply = QDBusConnection::sessionBus().call(message, QDBus::Block, 10000); if (reply.type() != QDBusMessage::ReplyMessage || reply.arguments().isEmpty()) return std::nullopt; return reply.arguments().first();}
void LiveSession::signal(const QString &path, const QString &interface, const QString &name, const QVariantList &arguments){ QDBusMessage message = QDBusMessage::createSignal(path, interface, name); message.setArguments(arguments); QDBusConnection::sessionBus().send(message);}
} // namespace xpl