File indexing completed on 2024-04-21 16:20:31

 /*
     SPDX-FileCopyrightText: 2014-2015 Harald Sitter <sitter@kde.org>
     SPDX-FileCopyrightText: 2016 David Rosca <nowrep@gmail.com>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "pulseaudio.h"
 
 #include "card.h"
 #include "debug.h"
 #include "module.h"
 #include "server.h"
 #include "sinkinput.h"
 #include "sourceoutput.h"
 #include "streamrestore.h"
 
 #include <QMetaEnum>
 
 namespace QPulseAudio
 {
 AbstractModel::AbstractModel(const MapBaseQObject *map, QObject *parent)
     : QAbstractListModel(parent)
     , m_map(map)
 {
     Context::instance()->ref();
 
     connect(m_map, &MapBaseQObject::aboutToBeAdded, this, [this](int index) {
         beginInsertRows(QModelIndex(), index, index);
     });
     connect(m_map, &MapBaseQObject::added, this, [this](int index) {
         onDataAdded(index);
         endInsertRows();
         Q_EMIT countChanged();
     });
     connect(m_map, &MapBaseQObject::aboutToBeRemoved, this, [this](int index) {
         beginRemoveRows(QModelIndex(), index, index);
     });
     connect(m_map, &MapBaseQObject::removed, this, [this](int index) {
         Q_UNUSED(index);
         endRemoveRows();
         Q_EMIT countChanged();
     });
 }
 
 AbstractModel::~AbstractModel()
 {
     // deref context after we've deleted this object
     // see https://bugs.kde.org/show_bug.cgi?id=371215
     Context::instance()->unref();
 }
 
 QHash<int, QByteArray> AbstractModel::roleNames() const
 {
     if (!m_roles.empty()) {
         qCDebug(PLASMAPA) << "returning roles" << m_roles;
         return m_roles;
     }
     Q_UNREACHABLE();
     return {};
 }
 
 int AbstractModel::rowCount(const QModelIndex &parent) const
 {
     if (parent.isValid()) {
         return 0;
     }
     return m_map->count();
 }
 
 QVariant AbstractModel::data(const QModelIndex &index, int role) const
 {
     if (!hasIndex(index.row(), index.column())) {
         return {};
     }
     QObject *data = m_map->objectAt(index.row());
     Q_ASSERT(data);
     if (role == PulseObjectRole) {
         return QVariant::fromValue(data);
     } else if (role == Qt::DisplayRole) {
         return static_cast<PulseObject *>(data)->properties().value(QStringLiteral("name")).toString();
     }
     int property = m_objectProperties.value(role, -1);
     if (property == -1) {
         return {};
     }
     return data->metaObject()->property(property).read(data);
 }
 
 bool AbstractModel::setData(const QModelIndex &index, const QVariant &value, int role)
 {
     if (!hasIndex(index.row(), index.column())) {
         return false;
     }
     int propertyIndex = m_objectProperties.value(role, -1);
     if (propertyIndex == -1) {
         return false;
     }
     QObject *data = m_map->objectAt(index.row());
     auto property = data->metaObject()->property(propertyIndex);
     return property.write(data, value);
 }
 
 int AbstractModel::role(const QByteArray &roleName) const
 {
     qCDebug(PLASMAPA) << roleName << m_roles.key(roleName, -1);
     return m_roles.key(roleName, -1);
 }
 
 Context *AbstractModel::context() const
 {
     return Context::instance();
 }
 
 void AbstractModel::initRoleNames(const QMetaObject &qobjectMetaObject)
 {
     m_roles[PulseObjectRole] = QByteArrayLiteral("PulseObject");
 
     QMetaEnum enumerator;
     for (int i = 0; i < metaObject()->enumeratorCount(); ++i) {
         if (metaObject()->enumerator(i).name() == QLatin1String("ItemRole")) {
             enumerator = metaObject()->enumerator(i);
             break;
         }
     }
 
     for (int i = 0; i < enumerator.keyCount(); ++i) {
         // Clip the Role suffix and glue it in the hash.
         const int roleLength = 4;
         QByteArray key(enumerator.key(i));
         // Enum values must end in Role or the enum is crap
         Q_ASSERT(key.right(roleLength) == QByteArrayLiteral("Role"));
         key.chop(roleLength);
         m_roles[enumerator.value(i)] = key;
     }
 
     int maxEnumValue = -1;
     for (auto it = m_roles.constBegin(); it != m_roles.constEnd(); ++it) {
         if (it.key() > maxEnumValue) {
             maxEnumValue = it.key();
         }
     }
     Q_ASSERT(maxEnumValue != -1);
     auto mo = qobjectMetaObject;
     for (int i = 0; i < mo.propertyCount(); ++i) {
         QMetaProperty property = mo.property(i);
         QString name(property.name());
         name.replace(0, 1, name.at(0).toUpper());
         m_roles[++maxEnumValue] = name.toLatin1();
         m_objectProperties.insert(maxEnumValue, i);
         if (!property.hasNotifySignal()) {
             continue;
         }
         m_signalIndexToProperties.insert(property.notifySignalIndex(), i);
     }
     qCDebug(PLASMAPA) << m_roles;
 
     // Connect to property changes also with objects already in model
     for (int i = 0; i < m_map->count(); ++i) {
         onDataAdded(i);
     }
 }
 
 void AbstractModel::propertyChanged()
 {
     if (!sender() || senderSignalIndex() == -1) {
         return;
     }
     int propertyIndex = m_signalIndexToProperties.value(senderSignalIndex(), -1);
     if (propertyIndex == -1) {
         return;
     }
     int role = m_objectProperties.key(propertyIndex, -1);
     if (role == -1) {
         return;
     }
     int index = m_map->indexOfObject(sender());
     qCDebug(PLASMAPA) << "PROPERTY CHANGED (" << index << ") :: " << role << roleNames().value(role);
     Q_EMIT dataChanged(createIndex(index, 0), createIndex(index, 0), {role});
 }
 
 void AbstractModel::onDataAdded(int index)
 {
     QObject *data = m_map->objectAt(index);
     const QMetaObject *mo = data->metaObject();
     // We have all the data changed notify signals already stored
     const auto keys = m_signalIndexToProperties.keys();
     for (const int index : keys) {
         QMetaMethod meth = mo->method(index);
         connect(data, meth, this, propertyChangedMetaMethod());
     }
 }
 
 QMetaMethod AbstractModel::propertyChangedMetaMethod() const
 {
     auto mo = metaObject();
     int methodIndex = mo->indexOfMethod("propertyChanged()");
     if (methodIndex == -1) {
         return {};
     }
     return mo->method(methodIndex);
 }
 
 SinkModel::SinkModel(QObject *parent)
     : AbstractModel(&context()->sinks(), parent)
     , m_preferredSink(nullptr)
 {
     initRoleNames(Sink::staticMetaObject);
 
     for (int i = 0; i < context()->sinks().count(); ++i) {
         sinkAdded(i);
     }
 
     connect(&context()->sinks(), &MapBaseQObject::added, this, &SinkModel::sinkAdded);
     connect(&context()->sinks(), &MapBaseQObject::removed, this, &SinkModel::sinkRemoved);
 
     connect(context()->server(), &Server::defaultSinkChanged, this, [this]() {
         updatePreferredSink();
         Q_EMIT defaultSinkChanged();
     });
 }
 
 Sink *SinkModel::defaultSink() const
 {
     return context()->server()->defaultSink();
 }
 
 Sink *SinkModel::preferredSink() const
 {
     return m_preferredSink;
 }
 
 QVariant SinkModel::data(const QModelIndex &index, int role) const
 {
     if (role == SortByDefaultRole) {
         // Workaround QTBUG-1548
         const QString pulseIndex = data(index, AbstractModel::role(QByteArrayLiteral("Index"))).toString();
         const QString defaultDevice = data(index, AbstractModel::role(QByteArrayLiteral("Default"))).toString();
         return defaultDevice + pulseIndex;
     }
     return AbstractModel::data(index, role);
 }
 
 void SinkModel::sinkAdded(int index)
 {
     Q_ASSERT(qobject_cast<Sink *>(context()->sinks().objectAt(index)));
     Sink *sink = static_cast<Sink *>(context()->sinks().objectAt(index));
     connect(sink, &Sink::stateChanged, this, &SinkModel::updatePreferredSink);
 
     updatePreferredSink();
 }
 
 void SinkModel::sinkRemoved(int index)
 {
     Q_UNUSED(index);
 
     updatePreferredSink();
 }
 
 void SinkModel::updatePreferredSink()
 {
     Sink *sink = findPreferredSink();
 
     if (sink != m_preferredSink) {
         qCDebug(PLASMAPA) << "Changing preferred sink to" << sink << (sink ? sink->name() : "");
         m_preferredSink = sink;
         Q_EMIT preferredSinkChanged();
     }
 }
 
 Sink *SinkModel::findPreferredSink() const
 {
     const auto &sinks = context()->sinks();
 
     // Only one sink is the preferred one
     if (sinks.count() == 1) {
         return static_cast<Sink *>(sinks.objectAt(0));
     }
 
     auto lookForState = [this](Device::State state) {
         Sink *ret = nullptr;
         QMapIterator<quint32, Sink *> it(context()->sinks().data());
         while (it.hasNext()) {
             it.next();
             if ((it.value()->isVirtualDevice() && !it.value()->isDefault()) || it.value()->state() != state) {
                 continue;
             }
             if (!ret) {
                 ret = it.value();
             } else if (it.value() == defaultSink()) {
                 ret = it.value();
                 break;
             }
         }
         return ret;
     };
 
     Sink *preferred = nullptr;
 
     // Look for playing sinks + prefer default sink
     preferred = lookForState(Device::RunningState);
     if (preferred) {
         return preferred;
     }
 
     // Look for idle sinks + prefer default sink
     preferred = lookForState(Device::IdleState);
     if (preferred) {
         return preferred;
     }
 
     // Fallback to default sink
     return defaultSink();
 }
 
 SourceModel::SourceModel(QObject *parent)
     : AbstractModel(&context()->sources(), parent)
 {
     initRoleNames(Source::staticMetaObject);
 
     connect(context()->server(), &Server::defaultSourceChanged, this, &SourceModel::defaultSourceChanged);
 }
 
 Source *SourceModel::defaultSource() const
 {
     return context()->server()->defaultSource();
 }
 
 QVariant SourceModel::data(const QModelIndex &index, int role) const
 {
     if (role == SortByDefaultRole) {
         // Workaround QTBUG-1548
         const QString pulseIndex = data(index, AbstractModel::role(QByteArrayLiteral("Index"))).toString();
         const QString defaultDevice = data(index, AbstractModel::role(QByteArrayLiteral("Default"))).toString();
         return defaultDevice + pulseIndex;
     }
     return AbstractModel::data(index, role);
 }
 
 SinkInputModel::SinkInputModel(QObject *parent)
     : AbstractModel(&context()->sinkInputs(), parent)
 {
     initRoleNames(SinkInput::staticMetaObject);
 }
 
 SourceOutputModel::SourceOutputModel(QObject *parent)
     : AbstractModel(&context()->sourceOutputs(), parent)
 {
     initRoleNames(SourceOutput::staticMetaObject);
 }
 
 CardModel::CardModel(QObject *parent)
     : AbstractModel(&context()->cards(), parent)
 {
     initRoleNames(Card::staticMetaObject);
 }
 
 StreamRestoreModel::StreamRestoreModel(QObject *parent)
     : AbstractModel(&context()->streamRestores(), parent)
 {
     initRoleNames(StreamRestore::staticMetaObject);
 }
 
 ModuleModel::ModuleModel(QObject *parent)
     : AbstractModel(&context()->modules(), parent)
 {
     initRoleNames(Module::staticMetaObject);
 }
 
 } // QPulseAudio