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// 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> *);
};
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