utils.cpp

/*
    SPDX-FileCopyrightText: 2019 Kai Uwe Broulik <kde@privat.broulik.de>
 
    SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
 
#include "utils_p.h"
 
#include <ranges>
 
#include "notifications.h"
 
#include <QAbstractItemModel>
#include <QAbstractProxyModel>
#include <QConcatenateTablesProxyModel>
#include <QCoreApplication>
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QFile>
#include <QFileInfo>
#include <QMetaEnum>
#include <QSettings>
#include <QTextStream>
 
#include <KProcessList>
 
using namespace NotificationManager;
 
QHash<int, QByteArray> Utils::roleNames()
{
    static QHash<int, QByteArray> s_roles;
 
    if (s_roles.isEmpty()) {
        // This generates role names from the Roles enum in the form of: FooRole -> foo
        const QMetaEnum e = QMetaEnum::fromType<Notifications::Roles>();
 
        // Qt built-in roles we use
        s_roles.insert(Qt::DisplayRole, QByteArrayLiteral("display"));
        s_roles.insert(Qt::DecorationRole, QByteArrayLiteral("decoration"));
        s_roles.insert(Qt::AccessibleDescriptionRole, QByteArrayLiteral("accessibleDescription"));
 
        for (int i = 0; i < e.keyCount(); ++i) {
            const int value = e.value(i);
 
            QByteArray key(e.key(i));
            key[0] = key[0] + 32; // lower case first letter
            key.chop(4); // strip "Role" suffix
 
            s_roles.insert(value, key);
        }
 
        s_roles.insert(Notifications::IdRole, QByteArrayLiteral("notificationId")); // id is QML-reserved
    }
 
    return s_roles;
}
 
QString Utils::processNameFromPid(uint pid)
{
    auto processInfo = KProcessList::processInfo(pid);
 
    if (!processInfo.isValid()) {
        return QString();
    }
 
    return processInfo.name();
}
 
QString Utils::desktopEntryFromPid(uint pid)
{
    const QString flatpakInfoPath = QStringLiteral("/proc/%1/root/.flatpak-info").arg(QString::number(pid));
    if (QFileInfo::exists(flatpakInfoPath)) {
        QSettings flatpakInfo(flatpakInfoPath, QSettings::IniFormat);
 
        const QString name = flatpakInfo.value("Application/name").toString();
        if (!name.isEmpty()) {
            return name;
        }
 
        // If it's a flatpak, can't be a snap, bail out.
        return QString();
    }
 
    QFile environFile(QStringLiteral("/proc/%1/environ").arg(QString::number(pid)));
    if (environFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
        constexpr QByteArrayView bamfDesktopFileHint("BAMF_DESKTOP_FILE_HINT");
 
        const QByteArray environ = environFile.readAll();
#if (defined(__GNUC__) && __GNUC__ >= 12) || !defined(__GNUC__)
        for (const QByteArrayView line : QByteArrayView(environ) | std::views::split('\0')) {
#else
        for (const QByteArrayView line : environ.split('\0')) {
#endif
            const auto equalsIdx = line.indexOf('=');
            if (equalsIdx == -1) {
                continue;
            }
 
            const QByteArrayView key = line.sliced(0, equalsIdx);
            if (key == bamfDesktopFileHint) {
                return QString::fromUtf8(line.sliced(equalsIdx + 1));
            }
        }
    }
 
    return QString();
}
 
QModelIndex Utils::mapToModel(const QModelIndex &idx, const QAbstractItemModel *sourceModel)
{
    // KModelIndexProxyMapper can only map different indices to a single source
    // but we have the other way round, a single index that splits into different source models
    QModelIndex resolvedIdx = idx;
    while (resolvedIdx.isValid() && resolvedIdx.model() != sourceModel) {
        if (auto *proxyModel = qobject_cast<const QAbstractProxyModel *>(resolvedIdx.model())) {
            resolvedIdx = proxyModel->mapToSource(resolvedIdx);
            // QConcatenateTablesProxyModel isn't a "real" proxy model, so we need to special case for it :(
        } else if (auto *concatenateModel = qobject_cast<const QConcatenateTablesProxyModel *>(resolvedIdx.model())) {
            resolvedIdx = concatenateModel->mapToSource(resolvedIdx);
        } else {
            if (resolvedIdx.model() != sourceModel) {
                resolvedIdx = QModelIndex(); // give up
            }
        }
    }
    return resolvedIdx;
}
 
bool Utils::isDBusMaster()
{
    return qApp->property("_plasma_dbus_master").toBool();
}