diff --git a/src/timeline/EventDelegateChooser.cpp b/src/timeline/EventDelegateChooser.cpp
new file mode 100644
index 00000000..7618e20b
--- /dev/null
+++ b/src/timeline/EventDelegateChooser.cpp
@@ -0,0 +1,244 @@
+// SPDX-FileCopyrightText: Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "EventDelegateChooser.h"
+#include "TimelineModel.h"
+
+#include "Logging.h"
+
+#include <QQmlEngine>
+#include <QtGlobal>
+
+// privat qt headers to access required properties
+#include <QtQml/private/qqmlincubator_p.h>
+#include <QtQml/private/qqmlobjectcreator_p.h>
+
+QQmlComponent *
+EventDelegateChoice::delegate() const
+{
+ return delegate_;
+}
+
+void
+EventDelegateChoice::setDelegate(QQmlComponent *delegate)
+{
+ if (delegate != delegate_) {
+ delegate_ = delegate;
+ emit delegateChanged();
+ emit changed();
+ }
+}
+
+QList<int>
+EventDelegateChoice::roleValues() const
+{
+ return roleValues_;
+}
+
+void
+EventDelegateChoice::setRoleValues(const QList<int> &value)
+{
+ if (value != roleValues_) {
+ roleValues_ = value;
+ emit roleValuesChanged();
+ emit changed();
+ }
+}
+
+QQmlListProperty<EventDelegateChoice>
+EventDelegateChooser::choices()
+{
+ return QQmlListProperty<EventDelegateChoice>(this,
+ this,
+ &EventDelegateChooser::appendChoice,
+ &EventDelegateChooser::choiceCount,
+ &EventDelegateChooser::choice,
+ &EventDelegateChooser::clearChoices);
+}
+
+void
+EventDelegateChooser::appendChoice(QQmlListProperty<EventDelegateChoice> *p, EventDelegateChoice *c)
+{
+ EventDelegateChooser *dc = static_cast<EventDelegateChooser *>(p->object);
+ dc->choices_.append(c);
+}
+
+qsizetype
+EventDelegateChooser::choiceCount(QQmlListProperty<EventDelegateChoice> *p)
+{
+ return static_cast<EventDelegateChooser *>(p->object)->choices_.count();
+}
+EventDelegateChoice *
+EventDelegateChooser::choice(QQmlListProperty<EventDelegateChoice> *p, qsizetype index)
+{
+ return static_cast<EventDelegateChooser *>(p->object)->choices_.at(index);
+}
+void
+EventDelegateChooser::clearChoices(QQmlListProperty<EventDelegateChoice> *p)
+{
+ static_cast<EventDelegateChooser *>(p->object)->choices_.clear();
+}
+
+void
+EventDelegateChooser::componentComplete()
+{
+ QQuickItem::componentComplete();
+ // eventIncubator.reset(eventIndex);
+}
+
+void
+EventDelegateChooser::DelegateIncubator::setInitialState(QObject *obj)
+{
+ auto item = qobject_cast<QQuickItem *>(obj);
+ if (!item)
+ return;
+
+ item->setParentItem(&chooser);
+
+ auto roleNames = chooser.room_->roleNames();
+ QHash<QByteArray, int> nameToRole;
+ for (const auto &[k, v] : roleNames.asKeyValueRange()) {
+ nameToRole.insert(v, k);
+ }
+
+ QHash<int, int> roleToPropIdx;
+ std::vector<QModelRoleData> roles;
+
+ // Workaround for https://bugreports.qt.io/browse/QTBUG-98846
+ QHash<QString, RequiredPropertyKey> requiredProperties;
+ for (const auto &[propKey, prop] :
+ QQmlIncubatorPrivate::get(this)->requiredProperties()->asKeyValueRange()) {
+ requiredProperties.insert(prop.propertyName, propKey);
+ }
+
+ // collect required properties
+ auto mo = obj->metaObject();
+ for (int i = 0; i < mo->propertyCount(); i++) {
+ auto prop = mo->property(i);
+ // nhlog::ui()->critical("Found prop {}", prop.name());
+ // See https://bugreports.qt.io/browse/QTBUG-98846
+ if (!prop.isRequired() && !requiredProperties.contains(prop.name()))
+ continue;
+
+ if (auto role = nameToRole.find(prop.name()); role != nameToRole.end()) {
+ roleToPropIdx.insert(*role, i);
+ roles.emplace_back(*role);
+
+ nhlog::ui()->critical("Found prop {}, idx {}, role {}", prop.name(), i, *role);
+ } else {
+ nhlog::ui()->critical("Required property {} not found in model!", prop.name());
+ }
+ }
+
+ nhlog::ui()->debug("Querying data for id {}", currentId.toStdString());
+ chooser.room_->multiData(currentId, forReply ? chooser.eventId_ : QString(), roles);
+
+ QVariantMap rolesToSet;
+ for (const auto &role : roles) {
+ const auto &roleName = roleNames[role.role()];
+ nhlog::ui()->critical("Setting role {}, {}", role.role(), roleName.toStdString());
+
+ mo->property(roleToPropIdx[role.role()]).write(obj, role.data());
+ rolesToSet.insert(roleName, role.data());
+
+ if (const auto &req = requiredProperties.find(roleName); req != requiredProperties.end())
+ QQmlIncubatorPrivate::get(this)->requiredProperties()->remove(*req);
+ }
+
+ // setInitialProperties(rolesToSet);
+
+ auto update =
+ [this, obj, roleToPropIdx = std::move(roleToPropIdx)](const QList<int> &changedRoles) {
+ std::vector<QModelRoleData> rolesToRequest;
+
+ if (changedRoles.empty()) {
+ for (auto role : roleToPropIdx.keys())
+ rolesToRequest.emplace_back(role);
+ } else {
+ for (auto role : changedRoles) {
+ if (roleToPropIdx.contains(role)) {
+ rolesToRequest.emplace_back(role);
+ }
+ }
+ }
+
+ if (rolesToRequest.empty())
+ return;
+
+ auto mo = obj->metaObject();
+ chooser.room_->multiData(
+ currentId, forReply ? chooser.eventId_ : QString(), rolesToRequest);
+ for (const auto &role : rolesToRequest) {
+ mo->property(roleToPropIdx[role.role()]).write(obj, role.data());
+ }
+ };
+
+ if (!forReply) {
+ auto row = chooser.room_->idToIndex(currentId);
+ connect(chooser.room_,
+ &QAbstractItemModel::dataChanged,
+ obj,
+ [row, update](const QModelIndex &topLeft,
+ const QModelIndex &bottomRight,
+ const QList<int> &changedRoles) {
+ if (row < topLeft.row() || row > bottomRight.row())
+ return;
+
+ update(changedRoles);
+ });
+ }
+}
+
+void
+EventDelegateChooser::DelegateIncubator::reset(QString id)
+{
+ if (!chooser.room_ || id.isEmpty())
+ return;
+
+ nhlog::ui()->debug("Reset with id {}, reply {}", id.toStdString(), forReply);
+
+ this->currentId = id;
+
+ auto role =
+ chooser.room_
+ ->dataById(id, TimelineModel::Roles::Type, forReply ? chooser.eventId_ : QString())
+ .toInt();
+
+ for (const auto choice : qAsConst(chooser.choices_)) {
+ const auto &choiceValue = choice->roleValues();
+ if (choiceValue.contains(role) || choiceValue.empty()) {
+ if (auto child = qobject_cast<QQuickItem *>(object())) {
+ child->setParentItem(nullptr);
+ }
+
+ choice->delegate()->create(*this, QQmlEngine::contextForObject(&chooser));
+ return;
+ }
+ }
+}
+
+void
+EventDelegateChooser::DelegateIncubator::statusChanged(QQmlIncubator::Status status)
+{
+ if (status == QQmlIncubator::Ready) {
+ auto child = qobject_cast<QQuickItem *>(object());
+ if (child == nullptr) {
+ nhlog::ui()->error("Delegate has to be derived of Item!");
+ return;
+ }
+
+ child->setParentItem(&chooser);
+ QQmlEngine::setObjectOwnership(child, QQmlEngine::ObjectOwnership::JavaScriptOwnership);
+ if (forReply)
+ emit chooser.replyChanged();
+ else
+ emit chooser.mainChanged();
+
+ } else if (status == QQmlIncubator::Error) {
+ auto errors_ = errors();
+ for (const auto &e : qAsConst(errors_))
+ nhlog::ui()->error("Error instantiating delegate: {}", e.toString().toStdString());
+ }
+}
+
diff --git a/src/timeline/EventDelegateChooser.h b/src/timeline/EventDelegateChooser.h
new file mode 100644
index 00000000..ce22ca3a
--- /dev/null
+++ b/src/timeline/EventDelegateChooser.h
@@ -0,0 +1,136 @@
+// SPDX-FileCopyrightText: Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// A DelegateChooser like the one, that was added to Qt5.12 (in labs), but compatible with older Qt
+// versions see KDE/kquickitemviews see qtdeclarative/qqmldelagatecomponent
+
+#pragma once
+
+#include <QAbstractItemModel>
+#include <QQmlComponent>
+#include <QQmlIncubator>
+#include <QQmlListProperty>
+#include <QQuickItem>
+#include <QtCore/QObject>
+#include <QtCore/QVariant>
+
+#include "TimelineModel.h"
+
+class EventDelegateChoice : public QObject
+{
+ Q_OBJECT
+ QML_ELEMENT
+ Q_CLASSINFO("DefaultProperty", "delegate")
+
+public:
+ Q_PROPERTY(QList<int> roleValues READ roleValues WRITE setRoleValues NOTIFY roleValuesChanged
+ REQUIRED FINAL)
+ Q_PROPERTY(
+ QQmlComponent *delegate READ delegate WRITE setDelegate NOTIFY delegateChanged REQUIRED FINAL)
+
+ [[nodiscard]] QQmlComponent *delegate() const;
+ void setDelegate(QQmlComponent *delegate);
+
+ [[nodiscard]] QList<int> roleValues() const;
+ void setRoleValues(const QList<int> &value);
+
+signals:
+ void delegateChanged();
+ void roleValuesChanged();
+ void changed();
+
+private:
+ QList<int> roleValues_;
+ QQmlComponent *delegate_ = nullptr;
+};
+
+class EventDelegateChooser : public QQuickItem
+{
+ Q_OBJECT
+ QML_ELEMENT
+ Q_CLASSINFO("DefaultProperty", "choices")
+
+public:
+ Q_PROPERTY(QQmlListProperty<EventDelegateChoice> choices READ choices CONSTANT FINAL)
+ Q_PROPERTY(QQuickItem *main READ main NOTIFY mainChanged FINAL)
+ Q_PROPERTY(TimelineModel *room READ room WRITE setRoom NOTIFY roomChanged REQUIRED FINAL)
+ Q_PROPERTY(QString eventId READ eventId WRITE setEventId NOTIFY eventIdChanged REQUIRED FINAL)
+ Q_PROPERTY(QString replyTo READ replyTo WRITE setReplyTo NOTIFY replyToChanged REQUIRED FINAL)
+
+ QQmlListProperty<EventDelegateChoice> choices();
+
+ [[nodiscard]] QQuickItem *main() const
+ {
+ return qobject_cast<QQuickItem *>(eventIncubator.object());
+ }
+
+ void setRoom(TimelineModel *m)
+ {
+ if (m != room_) {
+ room_ = m;
+ eventIncubator.reset(eventId_);
+ replyIncubator.reset(replyId);
+ emit roomChanged();
+ }
+ }
+ [[nodiscard]] TimelineModel *room() { return room_; }
+
+ void setEventId(QString idx)
+ {
+ eventId_ = idx;
+ emit eventIdChanged();
+ }
+ [[nodiscard]] QString eventId() const { return eventId_; }
+ void setReplyTo(QString id)
+ {
+ replyId = id;
+ emit replyToChanged();
+ }
+ [[nodiscard]] QString replyTo() const { return replyId; }
+
+ void componentComplete() override;
+
+signals:
+ void mainChanged();
+ void replyChanged();
+ void roomChanged();
+ void eventIdChanged();
+ void replyToChanged();
+
+private:
+ struct DelegateIncubator final : public QQmlIncubator
+ {
+ DelegateIncubator(EventDelegateChooser &parent, bool forReply)
+ : QQmlIncubator(QQmlIncubator::AsynchronousIfNested)
+ , chooser(parent)
+ , forReply(forReply)
+ {
+ }
+ void setInitialState(QObject *object) override;
+ void statusChanged(QQmlIncubator::Status status) override;
+
+ void reset(QString id);
+
+ EventDelegateChooser &chooser;
+ bool forReply;
+ QString currentId;
+
+ QString instantiatedId;
+ int instantiatedRole = -1;
+ QAbstractItemModel *instantiatedModel = nullptr;
+ };
+
+ QVariant roleValue_;
+ QList<EventDelegateChoice *> choices_;
+ DelegateIncubator eventIncubator{*this, false};
+ DelegateIncubator replyIncubator{*this, true};
+ TimelineModel *room_{nullptr};
+ QString eventId_;
+ QString replyId;
+
+ static void appendChoice(QQmlListProperty<EventDelegateChoice> *, EventDelegateChoice *);
+ static qsizetype choiceCount(QQmlListProperty<EventDelegateChoice> *);
+ static EventDelegateChoice *choice(QQmlListProperty<EventDelegateChoice> *, qsizetype index);
+ static void clearChoices(QQmlListProperty<EventDelegateChoice> *);
+};
diff --git a/src/timeline/TimelineModel.cpp b/src/timeline/TimelineModel.cpp
index b2a036c5..69ab3f5a 100644
--- a/src/timeline/TimelineModel.cpp
+++ b/src/timeline/TimelineModel.cpp
@@ -926,6 +926,26 @@ TimelineModel::multiData(const QModelIndex &index, QModelRoleDataSpan roleDataSp
}
}
+void
+TimelineModel::multiData(const QString &id,
+ const QString &relatedTo,
+ QModelRoleDataSpan roleDataSpan) const
+{
+ if (id.isEmpty())
+ return;
+
+ auto event = events.get(id.toStdString(), relatedTo.toStdString());
+
+ if (!event)
+ return;
+
+ for (QModelRoleData &roleData : roleDataSpan) {
+ int role = roleData.role();
+
+ roleData.setData(data(*event, role));
+ }
+}
+
QVariant
TimelineModel::dataById(const QString &id, int role, const QString &relatedTo)
{
diff --git a/src/timeline/TimelineModel.h b/src/timeline/TimelineModel.h
index fccc99eb..57caf26d 100644
--- a/src/timeline/TimelineModel.h
+++ b/src/timeline/TimelineModel.h
@@ -286,6 +286,8 @@ public:
int rowCount(const QModelIndex &parent = QModelIndex()) const override;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
void multiData(const QModelIndex &index, QModelRoleDataSpan roleDataSpan) const override;
+ void
+ multiData(const QString &id, const QString &relatedTo, QModelRoleDataSpan roleDataSpan) const;
QVariant data(const mtx::events::collections::TimelineEvents &event, int role) const;
Q_INVOKABLE QVariant dataById(const QString &id, int role, const QString &relatedTo);
Q_INVOKABLE QVariant dataByIndex(int i, int role = Qt::DisplayRole) const
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