+#include "qtui.h"
+#include "qtuistyle.h"
+#include "util.h"
+
+ChatView::ChatView(BufferId bufferId, QWidget* parent)
+ : QGraphicsView(parent)
+ , AbstractChatView()
+{
+ QList<BufferId> filterList;
+ filterList.append(bufferId);
+ auto* filter = new MessageFilter(Client::messageModel(), filterList, this);
+ init(filter);
+}
+
+ChatView::ChatView(MessageFilter* filter, QWidget* parent)
+ : QGraphicsView(parent)
+ , AbstractChatView()
+{
+ init(filter);
+}
+
+void ChatView::init(MessageFilter* filter)
+{
+ _bufferContainer = nullptr;
+ _currentScaleFactor = 1;
+ _invalidateFilter = false;
+
+ setAttribute(Qt::WA_AcceptTouchEvents);
+ setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+ setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+ setAlignment(Qt::AlignLeft | Qt::AlignBottom);
+ setInteractive(true);
+ // setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
+ // setOptimizationFlags(QGraphicsView::DontAdjustForAntialiasing);
+ setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
+ // setTransformationAnchor(QGraphicsView::NoAnchor);
+ setTransformationAnchor(QGraphicsView::AnchorViewCenter);
+
+ _scrollTimer.setInterval(100);
+ _scrollTimer.setSingleShot(true);
+ connect(&_scrollTimer, &QTimer::timeout, this, &ChatView::scrollTimerTimeout);
+
+ _scene = new ChatScene(filter, filter->idString(), viewport()->width(), this);
+ connect(_scene, &QGraphicsScene::sceneRectChanged, this, &ChatView::adjustSceneRect);
+ connect(_scene, &ChatScene::lastLineChanged, this, &ChatView::lastLineChanged);
+ connect(_scene, &ChatScene::mouseMoveWhileSelecting, this, &ChatView::mouseMoveWhileSelecting);
+ setScene(_scene);
+
+ connect(verticalScrollBar(), &QAbstractSlider::valueChanged, this, &ChatView::verticalScrollbarChanged);
+ _lastScrollbarPos = verticalScrollBar()->maximum();
+
+ // Workaround for the ChatView scrolling up a fair bit when scrollbar becomes visible
+ verticalScrollBar()->installEventFilter(this);
+
+ connect(Client::networkModel(), &NetworkModel::markerLineSet, this, &ChatView::markerLineSet);
+
+ // only connect if client is synched with a core
+ if (Client::isConnected())
+ connect(Client::ignoreListManager(), &ClientIgnoreListManager::ignoreListChanged, this, &ChatView::invalidateFilter);
+}
+
+bool ChatView::event(QEvent* event)
+{
+ if (event->type() == QEvent::KeyPress) {
+ auto* keyEvent = static_cast<QKeyEvent*>(event);
+ switch (keyEvent->key()) {
+ case Qt::Key_Up:
+ case Qt::Key_Down:
+ case Qt::Key_PageUp:
+ case Qt::Key_PageDown:
+ if (requestBacklogForScroll()) {
+ return true;
+ }
+ default:
+ break;
+ }
+ }
+
+ if (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type() == QTouchDevice::TouchScreen) {
+ // Enable scrolling by dragging, disable selecting/clicking content
+ setDragMode(QGraphicsView::ScrollHandDrag);
+ setInteractive(false);
+ // if scrollbar is not visible we need to request backlog below else we need to accept
+ // the event now (return true) so that we will receive TouchUpdate and TouchEnd/TouchCancel
+ if (verticalScrollBar()->isVisible())
+ return true;
+ }
+
+ if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
+ // End scroll and reset settings to default
+ setDragMode(QGraphicsView::NoDrag);
+ setInteractive(true);
+ _firstTouchUpdateHappened = false;
+ return true;
+ }
+
+ if (event->type() == QEvent::TouchUpdate) {
+ if (!_firstTouchUpdateHappened) {
+ // After the first movement of a Touch-Point, calculate the distance in both axis
+ // and if the point moved more horizontally abort scroll.
+ QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
+ double dx = qAbs(p.lastPos().x() - p.pos().x());
+ double dy = qAbs(p.lastPos().y() - p.pos().y());
+ if (dx > dy) {
+ setDragMode(QGraphicsView::NoDrag);
+ setInteractive(true);
+ }
+ _firstTouchUpdateHappened = true;
+ }
+ // Applying the movement happens automatically by the drag-mode
+ }
+ if (event->type() == QEvent::Wheel
+ || (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type() == QTouchDevice::TouchScreen)
+ || event->type() == QEvent::TouchUpdate) {
+ if (requestBacklogForScroll()) {
+ return true;
+ }
+ }
+
+ if (event->type() == QEvent::Show) {
+ if (_invalidateFilter)
+ invalidateFilter();
+ }
+
+ return QGraphicsView::event(event);
+}
+
+bool ChatView::eventFilter(QObject* watched, QEvent* event)
+{
+ QAbstractSlider* vbar = verticalScrollBar();
+ Q_ASSERT(vbar);
+
+ if (watched != vbar) {
+ // Ignore and pass through all events not featuring the scrollbar
+ return false;
+ }
+ if (event->type() == QEvent::Show) {
+ // FIXME: Workaround for the ChatView scrolling up a fair bit when transitioning from the
+ // vertical scrollbar not being visible, to becoming visible. This happens especially
+ // often when no initial backlog is loaded.
+ if (_backlogRequestedBeforeScrollable) {
+ _backlogRequestedBeforeScrollable = false;
+ vbar->setValue(vbar->maximum());
+ }
+ }
+ // Pass through all events
+ return false;
+}
+
+void ChatView::resizeEvent(QResizeEvent* event)
+{
+ // if view is currently scrolled to bottom, we want it that way after resizing
+ bool atBottom = (_lastScrollbarPos == verticalScrollBar()->maximum());
+
+ QGraphicsView::resizeEvent(event);
+
+ // if scrolling to bottom, do it immediately.
+ if (atBottom) {
+ // we can reduce viewport updates if we scroll to the bottom already at the beginning
+ verticalScrollBar()->setValue(verticalScrollBar()->maximum());
+ }
+
+ scene()->updateForViewport(viewport()->width(), viewport()->height());
+ adjustSceneRect();
+
+ if (atBottom) {
+ _lastScrollbarPos = verticalScrollBar()->maximum();
+ verticalScrollBar()->setValue(verticalScrollBar()->maximum());
+ }
+ checkChatLineCaches();
+}
+
+void ChatView::adjustSceneRect()
+{
+ // Workaround for QTBUG-6322
+ // If the viewport's sceneRect() is (almost) as wide as as the viewport itself,
+ // Qt wants to reserve space for scrollbars even if they're turned off, resulting in
+ // an ugly white space at the bottom of the ChatView.
+ // Since the view's scene's width actually doesn't matter at all, we just adjust it
+ // by some hopefully large enough value to avoid this problem.
+
+ setSceneRect(scene()->sceneRect().adjusted(0, 0, -25, 0));
+}
+
+void ChatView::mouseMoveWhileSelecting(const QPointF& scenePos)
+{
+ int y = (int)mapFromScene(scenePos).y();
+ _scrollOffset = 0;
+ if (y < 0)
+ _scrollOffset = y;
+ else if (y > height())
+ _scrollOffset = y - height();
+
+ if (_scrollOffset && !_scrollTimer.isActive())
+ _scrollTimer.start();
+}
+
+void ChatView::scrollTimerTimeout()
+{
+ // scroll view
+ QAbstractSlider* vbar = verticalScrollBar();
+ if (_scrollOffset < 0 && vbar->value() > 0)
+ vbar->setValue(qMax(vbar->value() + _scrollOffset, 0));
+ else if (_scrollOffset > 0 && vbar->value() < vbar->maximum())
+ vbar->setValue(qMin(vbar->value() + _scrollOffset, vbar->maximum()));
+}
+
+void ChatView::lastLineChanged(QGraphicsItem* chatLine, qreal offset)
+{
+ Q_UNUSED(chatLine)
+ // disabled until further testing/discussion
+ // if(!scene()->isScrollingAllowed())
+ // return;
+
+ QAbstractSlider* vbar = verticalScrollBar();
+ Q_ASSERT(vbar);
+ if (vbar->maximum() - vbar->value() <= (offset + 5) * _currentScaleFactor) { // 5px grace area
+ vbar->setValue(vbar->maximum());
+ }
+}