matrixion/include/TimelineView.h

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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
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#include <QApplication>
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#include <QLayout>
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#include <QList>
#include <QQueue>
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#include <QScrollArea>
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#include <QSettings>
#include <QStyle>
#include <QStyleOption>
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#include "Emote.h"
#include "File.h"
#include "Image.h"
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#include "MatrixClient.h"
#include "MessageEvent.h"
#include "Notice.h"
#include "Text.h"
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#include "TimelineItem.h"
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class FloatingButton;
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class RoomMessages;
class ScrollBar;
class Timeline;
struct DescInfo;
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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.
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struct PendingMessage
{
matrix::events::MessageEventType ty;
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int txn_id;
QString body;
QString filename;
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QString event_id;
TimelineItem *widget;
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PendingMessage(matrix::events::MessageEventType ty,
int txn_id,
QString body,
QString filename,
QString event_id,
TimelineItem *widget)
: ty(ty)
, txn_id(txn_id)
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, body(body)
, filename(filename)
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, event_id(event_id)
, widget(widget)
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{}
};
// In which place new TimelineItems should be inserted.
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enum class TimelineDirection
{
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Top,
Bottom,
};
class TimelineView : public QWidget
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{
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Q_OBJECT
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public:
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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,
bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Notice> &e,
bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Text> &e,
bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::Emote> &e,
bool with_sender);
TimelineItem *createTimelineItem(const events::MessageEvent<msgs::File> &e,
bool with_sender);
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// Add new events at the end of the timeline.
int addEvents(const Timeline &timeline);
void addUserMessage(matrix::events::MessageEventType ty, const QString &msg);
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template<class Widget, events::MessageEventType MsgType>
void addUserMessage(const QString &url, const QString &filename);
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void updatePendingMessage(int txn_id, QString event_id);
void scrollDown();
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public slots:
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void sliderRangeChanged(int min, int max);
void sliderMoved(int position);
void fetchHistory();
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// Add old events at the top of the timeline.
void addBackwardsEvents(const QString &room_id, const RoomMessages &msgs);
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// Whether or not the initial batch has been loaded.
bool hasLoaded() { return scroll_layout_->count() > 1 || isTimelineFinished; }
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void handleFailedMessage(int txnid);
private slots:
void sendNextPendingMessage();
signals:
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void updateLastTimelineMessage(const QString &user, const DescInfo &info);
void clearUnreadMessageCount(const QString &room_id);
protected:
void paintEvent(QPaintEvent *event) override;
void showEvent(QShowEvent *event) override;
bool event(QEvent *event) override;
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private:
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void init();
void addTimelineItem(TimelineItem *item, TimelineDirection direction);
void updateLastSender(const QString &user_id, TimelineDirection direction);
void notifyForLastEvent();
void readLastEvent() const;
QString getLastEventId() const;
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// Used to determine whether or not we should prefix a message with the
// sender's name.
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bool isSenderRendered(const QString &user_id, TimelineDirection direction);
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bool isPendingMessage(const QString &txnid, const QString &sender, const QString &userid);
void removePendingMessage(const QString &txnid);
bool isDuplicate(const QString &event_id) { return eventIds_.contains(event_id); }
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void handleNewUserMessage(PendingMessage msg);
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// Return nullptr if the event couldn't be parsed.
TimelineItem *parseMessageEvent(const QJsonObject &event, TimelineDirection direction);
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QVBoxLayout *top_layout_;
QVBoxLayout *scroll_layout_;
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QScrollArea *scroll_area_;
ScrollBar *scrollbar_;
QWidget *scroll_widget_;
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QString lastSender_;
QString firstSender_;
QString room_id_;
QString prev_batch_token_;
QString local_user_;
bool isPaginationInProgress_ = false;
// Keeps track whether or not the user has visited the view.
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bool isInitialized = false;
bool isTimelineFinished = false;
bool isInitialSync = true;
const int SCROLL_BAR_GAP = 200;
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QTimer *paginationTimer_;
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int scroll_height_ = 0;
int previous_max_height_ = 0;
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int oldPosition_;
int oldHeight_;
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FloatingButton *scrollDownBtn_;
TimelineDirection lastMessageDirection_;
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// The events currently rendered. Used for duplicate detection.
QMap<QString, bool> eventIds_;
QQueue<PendingMessage> pending_msgs_;
QList<PendingMessage> pending_sent_msgs_;
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QSharedPointer<MatrixClient> client_;
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};
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template<class Widget, events::MessageEventType MsgType>
void
TimelineView::addUserMessage(const QString &url, const QString &filename)
{
QSettings settings;
auto user_id = settings.value("auth/user_id").toString();
auto with_sender = lastSender_ != user_id;
auto widget = new Widget(client_, url, filename, this);
TimelineItem *view_item = new TimelineItem(widget, user_id, with_sender, scroll_widget_);
scroll_layout_->addWidget(view_item);
lastMessageDirection_ = TimelineDirection::Bottom;
QApplication::processEvents();
lastSender_ = user_id;
int txn_id = client_->incrementTransactionId();
PendingMessage message(MsgType, txn_id, url, filename, "", view_item);
handleNewUserMessage(message);
}