292 lines
9.2 KiB
C++
292 lines
9.2 KiB
C++
/*
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* nheko Copyright (C) 2017 Konstantinos Sideris <siderisk@auth.gr>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <QApplication>
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#include <QDebug>
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#include <QLayout>
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#include <QList>
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#include <QQueue>
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#include <QScrollArea>
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#include <QSettings>
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#include <QStyle>
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#include <QStyleOption>
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#include <mtx.hpp>
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#include "MatrixClient.h"
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#include "TimelineItem.h"
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class FloatingButton;
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class ScrollBar;
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struct DescInfo;
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// Contains info about a message shown in the history view
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// but not yet confirmed by the homeserver through sync.
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struct PendingMessage
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{
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mtx::events::MessageType ty;
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int txn_id;
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QString body;
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QString filename;
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QString event_id;
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TimelineItem *widget;
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PendingMessage(mtx::events::MessageType ty,
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int txn_id,
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QString body,
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QString filename,
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QString event_id,
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TimelineItem *widget)
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: ty(ty)
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, txn_id(txn_id)
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, body(body)
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, filename(filename)
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, event_id(event_id)
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, widget(widget)
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{}
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};
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// In which place new TimelineItems should be inserted.
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enum class TimelineDirection
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{
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Top,
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Bottom,
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};
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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 mtx::responses::Timeline &timeline,
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QSharedPointer<MatrixClient> client,
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const QString &room_id,
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QWidget *parent = 0);
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TimelineView(QSharedPointer<MatrixClient> client,
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const QString &room_id,
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QWidget *parent = 0);
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// Add new events at the end of the timeline.
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int addEvents(const mtx::responses::Timeline &timeline);
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void addUserMessage(mtx::events::MessageType ty, const QString &msg);
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template<class Widget, mtx::events::MessageType MsgType>
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void addUserMessage(const QString &url, const QString &filename);
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void updatePendingMessage(int txn_id, QString event_id);
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void scrollDown();
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public slots:
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void sliderRangeChanged(int min, int max);
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void sliderMoved(int position);
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void fetchHistory();
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// Add old events at the top of the timeline.
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void addBackwardsEvents(const QString &room_id, const mtx::responses::Messages &msgs);
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// Whether or not the initial batch has been loaded.
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bool hasLoaded() { return scroll_layout_->count() > 1 || isTimelineFinished; }
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void handleFailedMessage(int txnid);
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private slots:
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void sendNextPendingMessage();
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signals:
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void updateLastTimelineMessage(const QString &user, const DescInfo &info);
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void clearUnreadMessageCount(const QString &room_id);
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protected:
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void paintEvent(QPaintEvent *event) override;
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void showEvent(QShowEvent *event) override;
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bool event(QEvent *event) override;
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private:
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void init();
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void addTimelineItem(TimelineItem *item, TimelineDirection direction);
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void updateLastSender(const QString &user_id, TimelineDirection direction);
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void notifyForLastEvent();
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void readLastEvent() const;
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QString getLastEventId() const;
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QString getEventSender(const mtx::events::collections::TimelineEvents &event) const;
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template<class Event, class Widget>
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TimelineItem *processMessageEvent(const Event &event, TimelineDirection direction);
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// TODO: Remove this eventually.
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template<class Event>
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TimelineItem *processMessageEvent(const Event &event, TimelineDirection direction);
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// For events with custom display widgets.
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template<class Event, class Widget>
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TimelineItem *createTimelineItem(const Event &event, bool withSender);
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// For events without custom display widgets.
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// TODO: All events should have custom widgets.
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template<class Event>
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TimelineItem *createTimelineItem(const Event &event, bool withSender);
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// Used to determine whether or not we should prefix a message with the
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// 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);
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void removePendingMessage(const QString &txnid);
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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.
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TimelineItem *parseMessageEvent(const mtx::events::collections::TimelineEvents &event,
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TimelineDirection direction);
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QVBoxLayout *top_layout_;
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QVBoxLayout *scroll_layout_;
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QScrollArea *scroll_area_;
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ScrollBar *scrollbar_;
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QWidget *scroll_widget_;
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QString lastSender_;
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QString firstSender_;
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QString room_id_;
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QString prev_batch_token_;
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QString local_user_;
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bool isPaginationInProgress_ = false;
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// Keeps track whether or not the user has visited the view.
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bool isInitialized = false;
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bool isTimelineFinished = false;
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bool isInitialSync = true;
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const int SCROLL_BAR_GAP = 200;
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QTimer *paginationTimer_;
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int scroll_height_ = 0;
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int previous_max_height_ = 0;
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int oldPosition_;
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int oldHeight_;
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FloatingButton *scrollDownBtn_;
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TimelineDirection lastMessageDirection_;
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// The events currently rendered. Used for duplicate detection.
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QMap<QString, bool> eventIds_;
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QQueue<PendingMessage> pending_msgs_;
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QList<PendingMessage> pending_sent_msgs_;
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QSharedPointer<MatrixClient> client_;
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};
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template<class Widget, mtx::events::MessageType MsgType>
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void
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TimelineView::addUserMessage(const QString &url, const QString &filename)
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{
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QSettings settings;
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auto user_id = settings.value("auth/user_id").toString();
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auto with_sender = lastSender_ != user_id;
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auto widget = new Widget(client_, url, filename, this);
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TimelineItem *view_item = new TimelineItem(widget, user_id, with_sender, scroll_widget_);
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scroll_layout_->addWidget(view_item);
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lastMessageDirection_ = TimelineDirection::Bottom;
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QApplication::processEvents();
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lastSender_ = user_id;
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int txn_id = client_->incrementTransactionId();
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PendingMessage message(MsgType, txn_id, url, filename, "", view_item);
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handleNewUserMessage(message);
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}
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template<class Event>
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TimelineItem *
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TimelineView::createTimelineItem(const Event &event, bool withSender)
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{
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TimelineItem *item = new TimelineItem(event, withSender, scroll_widget_);
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return item;
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}
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template<class Event, class Widget>
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TimelineItem *
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TimelineView::createTimelineItem(const Event &event, bool withSender)
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{
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auto eventWidget = new Widget(client_, event);
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auto item = new TimelineItem(eventWidget, event, withSender, scroll_widget_);
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return item;
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}
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template<class Event>
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TimelineItem *
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TimelineView::processMessageEvent(const Event &event, TimelineDirection direction)
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{
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const auto event_id = QString::fromStdString(event.event_id);
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const auto sender = QString::fromStdString(event.sender);
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if (isDuplicate(event_id))
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return nullptr;
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eventIds_[event_id] = true;
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const QString txnid = QString::fromStdString(event.unsigned_data.transaction_id);
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if (!txnid.isEmpty() && isPendingMessage(txnid, sender, local_user_)) {
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removePendingMessage(txnid);
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return nullptr;
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}
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auto with_sender = isSenderRendered(sender, direction);
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updateLastSender(sender, direction);
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return createTimelineItem<Event>(event, with_sender);
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}
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template<class Event, class Widget>
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TimelineItem *
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TimelineView::processMessageEvent(const Event &event, TimelineDirection direction)
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{
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const auto event_id = QString::fromStdString(event.event_id);
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const auto sender = QString::fromStdString(event.sender);
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if (isDuplicate(event_id))
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return nullptr;
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eventIds_[event_id] = true;
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const QString txnid = QString::fromStdString(event.unsigned_data.transaction_id);
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if (!txnid.isEmpty() && isPendingMessage(txnid, sender, local_user_)) {
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removePendingMessage(txnid);
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return nullptr;
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}
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auto with_sender = isSenderRendered(sender, direction);
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updateLastSender(sender, direction);
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return createTimelineItem<Event, Widget>(event, with_sender);
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}
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