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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 <QApplication>
#include <QDebug>
#include <QLayout>
#include <QList>
#include <QQueue>
#include <QScrollArea>
#include <QStyle>
#include <QStyleOption>
#include <mtx/events.hpp>
#include <mtx/responses/messages.hpp>
#include "MatrixClient.h"
#include "ScrollBar.h"
#include "TimelineItem.h"
class FloatingButton;
struct DescInfo;
// Contains info about a message shown in the history view
// but not yet confirmed by the homeserver through sync.
struct PendingMessage
{
mtx::events::MessageType ty;
int txn_id;
QString body;
QString filename;
QString mime;
uint64_t media_size;
QString event_id;
TimelineItem *widget;
PendingMessage(mtx::events::MessageType ty,
int txn_id,
QString body,
QString filename,
QString mime,
uint64_t media_size,
QString event_id,
TimelineItem *widget)
: ty(ty)
, txn_id(txn_id)
, body(body)
, filename(filename)
, mime(mime)
, media_size(media_size)
, 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 mtx::responses::Timeline &timeline,
QSharedPointer<MatrixClient> client,
const QString &room_id,
QWidget *parent = 0);
TimelineView(QSharedPointer<MatrixClient> client,
const QString &room_id,
QWidget *parent = 0);
// Add new events at the end of the timeline.
void addEvents(const mtx::responses::Timeline &timeline);
void addUserMessage(mtx::events::MessageType ty, const QString &msg);
template<class Widget, mtx::events::MessageType MsgType>
void addUserMessage(const QString &url,
const QString &filename,
const QString &mime,
uint64_t size);
void updatePendingMessage(int txn_id, QString event_id);
void scrollDown();
QLabel *createDateSeparator(QDateTime datetime);
//! Remove an item from the timeline with the given Event ID.
void removeEvent(const QString &event_id);
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 mtx::responses::Messages &msgs);
// Whether or not the initial batch has been loaded.
bool hasLoaded() { return scroll_layout_->count() > 1 || isTimelineFinished; }
void handleFailedMessage(int txnid);
private slots:
void sendNextPendingMessage();
signals:
void updateLastTimelineMessage(const QString &user, const DescInfo &info);
protected:
void paintEvent(QPaintEvent *event) override;
void showEvent(QShowEvent *event) override;
bool event(QEvent *event) override;
private:
using TimelineEvent = mtx::events::collections::TimelineEvents;
QWidget *relativeWidget(TimelineItem *item, int dt) const;
//! HACK: Fixing layout flickering when adding to the bottom
//! of the timeline.
void pushTimelineItem(TimelineItem *item)
{
item->hide();
scroll_layout_->addWidget(item);
QTimer::singleShot(0, this, [item]() { item->show(); });
};
//! Decides whether or not to show or hide the scroll down button.
void toggleScrollDownButton();
void init();
void addTimelineItem(TimelineItem *item,
TimelineDirection direction = TimelineDirection::Bottom);
void updateLastSender(const QString &user_id, TimelineDirection direction);
void notifyForLastEvent();
void notifyForLastEvent(const TimelineEvent &event);
void readLastEvent() const;
bool isScrollbarActivated() { return scroll_area_->verticalScrollBar()->value() != 0; }
QString getLastEventId() const;
QString getEventSender(const mtx::events::collections::TimelineEvents &event) const;
template<class Event, class Widget>
TimelineItem *processMessageEvent(const Event &event, TimelineDirection direction);
// TODO: Remove this eventually.
template<class Event>
TimelineItem *processMessageEvent(const Event &event, TimelineDirection direction);
// For events with custom display widgets.
template<class Event, class Widget>
TimelineItem *createTimelineItem(const Event &event, bool withSender);
// For events without custom display widgets.
// TODO: All events should have custom widgets.
template<class Event>
TimelineItem *createTimelineItem(const Event &event, bool withSender);
// 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 QString &txnid, const QString &sender, const QString &userid);
void removePendingMessage(const QString &txnid);
bool isDuplicate(const QString &event_id) { return eventIds_.contains(event_id); }
void handleNewUserMessage(PendingMessage msg);
// Return nullptr if the event couldn't be parsed.
TimelineItem *parseMessageEvent(const mtx::events::collections::TimelineEvents &event,
TimelineDirection direction);
QVBoxLayout *top_layout_;
QVBoxLayout *scroll_layout_;
QScrollArea *scroll_area_;
ScrollBar *scrollbar_;
QWidget *scroll_widget_;
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.
bool isInitialized = false;
bool isTimelineFinished = false;
bool isInitialSync = true;
const int SCROLL_BAR_GAP = 200;
QTimer *paginationTimer_;
int scroll_height_ = 0;
int previous_max_height_ = 0;
int oldPosition_;
int oldHeight_;
FloatingButton *scrollDownBtn_;
TimelineDirection lastMessageDirection_;
//! Messages received by sync not added to the timeline.
std::vector<TimelineEvent> bottomMessages_;
//! Messages received by /messages not added to the timeline.
std::vector<TimelineEvent> topMessages_;
//! Render the given timeline events to the bottom of the timeline.
void renderBottomEvents(const std::vector<TimelineEvent> &events);
//! Render the given timeline events to the top of the timeline.
void renderTopEvents(const std::vector<TimelineEvent> &events);
//! Decide if the given timeline event can be rendered.
inline bool isViewable(const TimelineEvent &event) const;
//! Decide if the given event should trigger a notification.
inline bool isNotifiable(const TimelineEvent &event) const;
// The events currently rendered. Used for duplicate detection.
QMap<QString, TimelineItem *> eventIds_;
QQueue<PendingMessage> pending_msgs_;
QList<PendingMessage> pending_sent_msgs_;
QSharedPointer<MatrixClient> client_;
};
template<class Widget, mtx::events::MessageType MsgType>
void
TimelineView::addUserMessage(const QString &url,
const QString &filename,
const QString &mime,
uint64_t size)
{
auto with_sender = lastSender_ !=
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