88fada89ea
Limit the maximum number of avatars shown for other user read markers and collapsed state events For state events \  For read markers \ 
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
// SPDX-FileCopyrightText: 2022 Tobias Fella <tobias.fella@kde.org>
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// SPDX-License-Identifier: LGPL-2.0-or-later
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#pragma once
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#include "messageeventmodel.h"
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#include <QSortFilterProxyModel>
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/**
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* @class CollapseStateProxyModel
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*
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* This model aggregates multiple sequential state events into a single entry.
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*
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* Events are only aggregated if they happened on the same day.
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*
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* @sa MessageEventModel
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*/
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class CollapseStateProxyModel : public QSortFilterProxyModel
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{
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Q_OBJECT
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public:
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/**
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* @brief Defines the model roles.
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*/
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enum Roles {
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AggregateDisplayRole = MessageEventModel::LastRole + 1, /**< Single line aggregation of all the state events. */
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StateEventsRole, /**< List of state events in the aggregated state. */
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AuthorListRole, /**< List of the first 5 unique authors of the aggregated state event. */
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ExcessAuthorsRole, /**< The number of unique authors beyond the first 5. */
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};
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/**
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* @brief Whether a row should be shown out or not.
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*
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* @sa QSortFilterProxyModel::filterAcceptsRow
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*/
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[[nodiscard]] bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const override;
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/**
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* @brief Get the given role value at the given index.
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*
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* @sa QSortFilterProxyModel::data
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*/
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[[nodiscard]] QVariant data(const QModelIndex &idx, int role = Qt::DisplayRole) const override;
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/**
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* @brief Returns a mapping from Role enum values to role names.
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*
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* @sa Roles, QAbstractProxyModel::roleNames()
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*/
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[[nodiscard]] QHash<int, QByteArray> roleNames() const override;
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private:
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/**
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* @brief Aggregation of the text of consecutive state events starting at row.
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*
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* If state events happen on different days they will be split into two aggregate
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* events.
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*/
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[[nodiscard]] QString aggregateEventToString(int row) const;
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/**
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* @brief Return a list of consecutive state events starting at row.
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*
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* If state events happen on different days they will be split into two aggregate
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* events.
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*/
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[[nodiscard]] QVariantList stateEventsList(int row) const;
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/**
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* @brief List of the first 5 unique authors for the aggregate state events starting at row.
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*/
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[[nodiscard]] QVariantList authorList(int row) const;
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/**
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* @brief The number of unique authors beyond the first 5 for the aggregate state events starting at row.
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*/
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[[nodiscard]] QString excessAuthors(int row) const;
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};
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