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/*
* nheko Copyright (C) 2017 Konstantinos Sideris <siderisk@auth.gr>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <QHBoxLayout>
#include <QList>
#include <QScrollArea>
#include <QVBoxLayout>
#include <QWidget>
#include "ScrollBar.h"
#include "Sync.h"
#include "TimelineItem.h"
#include "Image.h"
#include "Notice.h"
#include "RoomInfoListItem.h"
#include "Text.h"
namespace msgs = matrix::events::messages;
namespace events = matrix::events;
// Contains info about a message shown in the history view
// but not yet confirmed by the homeserver through sync.
struct PendingMessage {
int txn_id;
QString body;
QString event_id;
TimelineItem *widget;
PendingMessage(int txn_id, QString body, QString event_id, TimelineItem *widget)
: txn_id(txn_id)
, body(body)
, event_id(event_id)
, widget(widget)
{
}
};
// In which place new TimelineItems should be inserted.
enum class TimelineDirection {
Top,
Bottom,
};
class TimelineView : public QWidget
{
Q_OBJECT
public:
TimelineView(const Timeline &timeline, QSharedPointer<MatrixClient> client, const QString &room_id, QWidget *parent = 0);
TimelineView(QSharedPointer<MatrixClient> client, const QString &room_id, QWidget *parent = 0);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Image> &e, const QString &color, bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Notice> &e, const QString &color, bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Text> &e, const QString &color, bool with_sender);
// Add new events at the end of the timeline.
int addEvents(const Timeline &timeline);
void addUserTextMessage(const QString &msg, int txn_id);
void updatePendingMessage(int txn_id, QString event_id);
void scrollDown();
public slots:
void sliderRangeChanged(int min, int max);
void sliderMoved(int position);
void fetchHistory();
// Add old events at the top of the timeline.
void addBackwardsEvents(const QString &room_id, const RoomMessages &msgs);
signals:
void updateLastTimelineMessage(const QString &user, const DescInfo &info);
private:
void init();
void removePendingMessage(const events::MessageEvent<msgs::Text> &e);
void addTimelineItem(TimelineItem *item, TimelineDirection direction);
void updateLastSender(const QString &user_id, TimelineDirection direction);
void notifyForLastEvent();
// Used to determine whether or not we should prefix a message with the sender's name.
bool isSenderRendered(const QString &user_id, TimelineDirection direction);
bool isPendingMessage(const events::MessageEvent<msgs::Text> &e, const QString &userid);
inline bool isDuplicate(const QString &event_id);
// Return nullptr if the event couldn't be parsed.
TimelineItem *parseMessageEvent(const QJsonObject &event, TimelineDirection direction);
QVBoxLayout *top_layout_;
QVBoxLayout *scroll_layout_;
QScrollArea *scroll_area_;
ScrollBar *scrollbar_;
QWidget *scroll_widget_;
QString last_sender_;
QString last_sender_backwards_;
QString room_id_;
QString prev_batch_token_;
QString local_user_;
bool isPaginationInProgress_ = false;
bool isInitialized = false;
bool isTimelineFinished = false;
bool isInitialSync = true;
bool isPaginationScrollPending_ = false;
const int SCROLL_BAR_GAP = 400;
QTimer *paginationTimer_;
int scroll_height_ = 0;
int previous_max_height_ = 0;
int oldPosition_;
int oldHeight_;
// The events currently rendered. Used for duplicate detection.
QMap<QString, bool> eventIds_;
QList<PendingMessage> pending_msgs_;
QSharedPointer<MatrixClient> client_;
};
inline bool TimelineView::isDuplicate(const QString &event_id)
{
return eventIds_.contains(event_id);
}
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