File indexing completed on 2024-05-05 16:18:27

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2002 John Firebaugh <jfirebaugh@kde.org>
     SPDX-FileCopyrightText: 2002 Joseph Wenninger <jowenn@kde.org>
     SPDX-FileCopyrightText: 2002, 2003 Christoph Cullmann <cullmann@kde.org>
     SPDX-FileCopyrightText: 2002-2007 Hamish Rodda <rodda@kde.org>
     SPDX-FileCopyrightText: 2003 Anakim Border <aborder@sources.sourceforge.net>
     SPDX-FileCopyrightText: 2007 Mirko Stocker <me@misto.ch>
     SPDX-FileCopyrightText: 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
     SPDX-FileCopyrightText: 2008 Erlend Hamberg <ehamberg@gmail.com>
 
     Based on KWriteView:
     SPDX-FileCopyrightText: 1999 Jochen Wilhelmy <digisnap@cs.tu-berlin.de>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 #include "kateviewinternal.h"
 
 #include "kateabstractinputmode.h"
 #include "kateabstractinputmodefactory.h"
 #include "katebuffer.h"
 #include "katecompletionwidget.h"
 #include "kateconfig.h"
 #include "kateglobal.h"
 #include "katehighlight.h"
 #include "katelayoutcache.h"
 #include "katemessagewidget.h"
 #include "katepartdebug.h"
 #include "katetextanimation.h"
 #include "katetextpreview.h"
 #include "kateview.h"
 #include "kateviewaccessible.h"
 #include "kateviewhelpers.h"
 #include "spellcheck/spellingmenu.h"
 
 #include <KCursor>
 #include <ktexteditor/documentcursor.h>
 #include <ktexteditor/inlinenoteprovider.h>
 #include <ktexteditor/movingrange.h>
 #include <ktexteditor/texthintinterface.h>
 
 #include <QAccessible>
 #include <QApplication>
 #include <QClipboard>
 #include <QKeyEvent>
 #include <QLayout>
 #include <QMenu>
 #include <QMimeData>
 #include <QPainter>
 #include <QPixmap>
 #include <QScopeGuard>
 #include <QScroller>
 #include <QStyle>
 #include <QToolTip>
 
 static const bool debugPainting = false;
 
 class ZoomEventFilter
 {
 public:
     ZoomEventFilter() = default;
 
     bool detectZoomingEvent(QWheelEvent *e, Qt::KeyboardModifiers modifier = Qt::ControlModifier)
     {
         Qt::KeyboardModifiers modState = e->modifiers();
         if (modState == modifier) {
             if (m_lastWheelEvent.isValid()) {
                 const qint64 deltaT = m_lastWheelEvent.elapsed();
                 // Pressing the specified modifier key within 200ms of the previous "unmodified"
                 // wheelevent is not allowed to toggle on text zooming
                 if (m_lastWheelEventUnmodified && deltaT < 200) {
                     m_ignoreZoom = true;
                 } else if (deltaT > 1000) {
                     // the protection is kept active for 1s after the last wheel event
                     // TODO: this value should be tuned, preferably by someone using
                     // Ctrl+Wheel zooming frequently.
                     m_ignoreZoom = false;
                 }
             } else {
                 // we can't say anything and have to assume there's nothing
                 // accidental to the modifier being pressed.
                 m_ignoreZoom = false;
             }
             m_lastWheelEventUnmodified = false;
             if (m_ignoreZoom) {
                 // unset the modifier so the view scrollbars can handle the scroll
                 // event and produce normal, not accelerated scrolling
                 modState &= ~modifier;
                 e->setModifiers(modState);
             }
         } else {
             // state is reset after any wheel event without the zoom modifier
             m_lastWheelEventUnmodified = true;
             m_ignoreZoom = false;
         }
         m_lastWheelEvent.start();
 
         // inform the caller whether this event is allowed to trigger text zooming.
         return !m_ignoreZoom && modState == modifier;
     }
 
 protected:
     QElapsedTimer m_lastWheelEvent;
     bool m_ignoreZoom = false;
     bool m_lastWheelEventUnmodified = false;
 };
 
 KateViewInternal::KateViewInternal(KTextEditor::ViewPrivate *view)
     : QWidget(view)
     , editSessionNumber(0)
     , editIsRunning(false)
     , m_view(view)
     , m_cursor(doc()->buffer(), KTextEditor::Cursor(0, 0), Kate::TextCursor::MoveOnInsert)
     , m_mouse()
     , m_possibleTripleClick(false)
     , m_bm(doc()->newMovingRange(KTextEditor::Range::invalid(), KTextEditor::MovingRange::DoNotExpand))
     , m_bmStart(doc()->newMovingRange(KTextEditor::Range::invalid(), KTextEditor::MovingRange::DoNotExpand))
     , m_bmEnd(doc()->newMovingRange(KTextEditor::Range::invalid(), KTextEditor::MovingRange::DoNotExpand))
     , m_bmLastFlashPos(doc()->newMovingCursor(KTextEditor::Cursor::invalid()))
 
     // folding marker
     , m_fmStart(doc()->newMovingRange(KTextEditor::Range::invalid(), KTextEditor::MovingRange::DoNotExpand))
     , m_fmEnd(doc()->newMovingRange(KTextEditor::Range::invalid(), KTextEditor::MovingRange::DoNotExpand))
 
     , m_dummy(nullptr)
 
     // stay on cursor will avoid that the view scroll around on press return at beginning
     , m_startPos(doc()->buffer(), KTextEditor::Cursor(0, 0), Kate::TextCursor::StayOnInsert)
 
     , m_visibleLineCount(0)
     , m_madeVisible(false)
     , m_shiftKeyPressed(false)
     , m_autoCenterLines(0)
     , m_minLinesVisible(0)
     , m_selChangedByUser(false)
     , m_selectAnchor(-1, -1)
     , m_selectionMode(Default)
     , m_layoutCache(new KateLayoutCache(renderer(), this))
     , m_preserveX(false)
     , m_preservedX(0)
     , m_cachedMaxStartPos(-1, -1)
     , m_dragScrollTimer(this)
     , m_scrollTimer(this)
     , m_cursorTimer(this)
     , m_textHintTimer(this)
     , m_textHintDelay(500)
     , m_textHintPos(-1, -1)
     , m_imPreeditRange(nullptr)
 {
     // setup input modes
     Q_ASSERT(m_inputModes.size() == KTextEditor::EditorPrivate::self()->inputModeFactories().size());
     m_inputModes[KTextEditor::View::NormalInputMode].reset(
         KTextEditor::EditorPrivate::self()->inputModeFactories()[KTextEditor::View::NormalInputMode]->createInputMode(this));
     m_inputModes[KTextEditor::View::ViInputMode].reset(
         KTextEditor::EditorPrivate::self()->inputModeFactories()[KTextEditor::View::ViInputMode]->createInputMode(this));
     m_currentInputMode = m_inputModes[KTextEditor::View::NormalInputMode].get();
 
     setMinimumSize(0, 0);
     setAttribute(Qt::WA_OpaquePaintEvent);
     setAttribute(Qt::WA_InputMethodEnabled);
 
     // invalidate m_selectionCached.start(), or keyb selection is screwed initially
     m_selectionCached = KTextEditor::Range::invalid();
 
     // bracket markers are only for this view and should not be printed
     m_bm->setView(m_view);
     m_bmStart->setView(m_view);
     m_bmEnd->setView(m_view);
     m_bm->setAttributeOnlyForViews(true);
     m_bmStart->setAttributeOnlyForViews(true);
     m_bmEnd->setAttributeOnlyForViews(true);
 
     // use z depth defined in moving ranges interface
     m_bm->setZDepth(-1000.0);
     m_bmStart->setZDepth(-1000.0);
     m_bmEnd->setZDepth(-1000.0);
 
     // update mark attributes
     updateBracketMarkAttributes();
 
     //
     // scrollbar for lines
     //
     m_lineScroll = new KateScrollBar(Qt::Vertical, this);
     m_lineScroll->show();
     m_lineScroll->setTracking(true);
     m_lineScroll->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
 
     // Hijack the line scroller's controls, so we can scroll nicely for word-wrap
     connect(m_lineScroll, &KateScrollBar::actionTriggered, this, &KateViewInternal::scrollAction);
 
     auto viewScrollLinesSlot = qOverload<int>(&KateViewInternal::scrollLines);
     connect(m_lineScroll, &KateScrollBar::sliderMoved, this, viewScrollLinesSlot);
     connect(m_lineScroll, &KateScrollBar::sliderMMBMoved, this, viewScrollLinesSlot);
     connect(m_lineScroll, &KateScrollBar::valueChanged, this, viewScrollLinesSlot);
 
     //
     // scrollbar for columns
     //
     m_columnScroll = new QScrollBar(Qt::Horizontal, m_view);
     m_scroller = QScroller::scroller(this);
     QScrollerProperties prop;
     prop.setScrollMetric(QScrollerProperties::DecelerationFactor, 0.3);
     prop.setScrollMetric(QScrollerProperties::MaximumVelocity, 1);
     prop.setScrollMetric(QScrollerProperties::AcceleratingFlickMaximumTime, 0.2); // Workaround for QTBUG-88249 (non-flick gestures recognized as accelerating flick)
     prop.setScrollMetric(QScrollerProperties::HorizontalOvershootPolicy, QScrollerProperties::OvershootAlwaysOff);
     prop.setScrollMetric(QScrollerProperties::VerticalOvershootPolicy, QScrollerProperties::OvershootAlwaysOff);
     prop.setScrollMetric(QScrollerProperties::DragStartDistance, 0.0);
     m_scroller->setScrollerProperties(prop);
 #ifndef Q_OS_MACOS
     // On macOS the trackpad also emits touch events which are sometimes picked up by the flick
     // gesture recogniser registered by QScroller; this results in some odd scrolling behaviour
     // as described in bug #442060.  Therefore it's better to not let the QScroller register
     // it on that platform.
     m_scroller->grabGesture(this);
 #endif
 
     if (m_view->dynWordWrap()) {
         m_columnScroll->hide();
     } else {
         m_columnScroll->show();
     }
 
     m_columnScroll->setTracking(true);
     m_startX = 0;
 
     connect(m_columnScroll, &QScrollBar::valueChanged, this, &KateViewInternal::scrollColumns);
 
     // bottom corner box
     m_dummy = new QWidget(m_view);
     m_dummy->setFixedSize(m_lineScroll->width(), m_columnScroll->sizeHint().height());
     m_dummy->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 
     if (m_view->dynWordWrap()) {
         m_dummy->hide();
     } else {
         m_dummy->show();
     }
 
     cache()->setWrap(m_view->dynWordWrap());
 
     //
     // iconborder ;)
     //
     m_leftBorder = new KateIconBorder(this, m_view);
     m_leftBorder->show();
 
     // update view if folding ranges change
     connect(&m_view->textFolding(), &Kate::TextFolding::foldingRangesChanged, this, &KateViewInternal::slotRegionVisibilityChanged);
 
     m_displayCursor.setPosition(0, 0);
 
     setAcceptDrops(true);
 
     m_zoomEventFilter.reset(new ZoomEventFilter());
     // event filter
     installEventFilter(this);
 
     // set initial cursor
     m_mouseCursor = Qt::IBeamCursor;
     setCursor(m_mouseCursor);
 
     // call mouseMoveEvent also if no mouse button is pressed
     setMouseTracking(true);
 
     m_dragInfo.state = diNone;
 
     // timers
     connect(&m_dragScrollTimer, &QTimer::timeout, this, &KateViewInternal::doDragScroll);
 
     connect(&m_scrollTimer, &QTimer::timeout, this, &KateViewInternal::scrollTimeout);
 
     connect(&m_cursorTimer, &QTimer::timeout, this, &KateViewInternal::cursorTimeout);
 
     connect(&m_textHintTimer, &QTimer::timeout, this, &KateViewInternal::textHintTimeout);
 
     // selection changed to set anchor
     connect(m_view, &KTextEditor::ViewPrivate::selectionChanged, this, &KateViewInternal::viewSelectionChanged);
 
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::installFactory(accessibleInterfaceFactory);
 #endif
     connect(doc(), &KTextEditor::DocumentPrivate::textInsertedRange, this, &KateViewInternal::documentTextInserted);
     connect(doc(), &KTextEditor::DocumentPrivate::textRemoved, this, &KateViewInternal::documentTextRemoved);
 
     // update is called in KTextEditor::ViewPrivate, after construction and layout is over
     // but before any other kateviewinternal call
 }
 
 KateViewInternal::~KateViewInternal()
 {
     // delete text animation object here, otherwise it updates the view in its destructor
     delete m_textAnimation;
 
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::removeFactory(accessibleInterfaceFactory);
 #endif
 }
 
 void KateViewInternal::dynWrapChanged()
 {
     m_dummy->setFixedSize(m_lineScroll->width(), m_columnScroll->sizeHint().height());
     if (view()->dynWordWrap()) {
         m_columnScroll->hide();
         m_dummy->hide();
 
     } else {
         // column scrollbar + bottom corner box
         m_columnScroll->show();
         m_dummy->show();
     }
 
     cache()->setWrap(view()->dynWordWrap());
     updateView();
 
     if (view()->dynWordWrap()) {
         scrollColumns(0);
     }
 
     update();
 }
 
 KTextEditor::Cursor KateViewInternal::endPos() const
 {
     // Hrm, no lines laid out at all??
     if (!cache()->viewCacheLineCount()) {
         return KTextEditor::Cursor();
     }
 
     for (int i = qMin(linesDisplayed() - 1, cache()->viewCacheLineCount() - 1); i >= 0; i--) {
         const KateTextLayout &thisLine = cache()->viewLine(i);
 
         if (thisLine.line() == -1) {
             continue;
         }
 
         if (thisLine.virtualLine() >= view()->textFolding().visibleLines()) {
             // Cache is too out of date
             return KTextEditor::Cursor(view()->textFolding().visibleLines() - 1,
                                        doc()->lineLength(view()->textFolding().visibleLineToLine(view()->textFolding().visibleLines() - 1)));
         }
 
         return KTextEditor::Cursor(thisLine.virtualLine(), thisLine.wrap() ? thisLine.endCol() - 1 : thisLine.endCol());
     }
 
     // can happen, if view is still invisible
     return KTextEditor::Cursor();
 }
 
 int KateViewInternal::endLine() const
 {
     return endPos().line();
 }
 
 KateTextLayout KateViewInternal::yToKateTextLayout(int y) const
 {
     if (y < 0 || y > size().height()) {
         return KateTextLayout::invalid();
     }
 
     int range = y / renderer()->lineHeight();
 
     // lineRanges is always bigger than 0, after the initial updateView call
     if (range >= 0 && range < cache()->viewCacheLineCount()) {
         return cache()->viewLine(range);
     }
 
     return KateTextLayout::invalid();
 }
 
 int KateViewInternal::lineToY(int viewLine) const
 {
     return (viewLine - startLine()) * renderer()->lineHeight();
 }
 
 void KateViewInternal::slotIncFontSizes(qreal step)
 {
     renderer()->increaseFontSizes(step);
 }
 
 void KateViewInternal::slotDecFontSizes(qreal step)
 {
     renderer()->decreaseFontSizes(step);
 }
 
 void KateViewInternal::slotResetFontSizes()
 {
     renderer()->resetFontSizes();
 }
 
 /**
  * Line is the real line number to scroll to.
  */
 void KateViewInternal::scrollLines(int line)
 {
     KTextEditor::Cursor newPos(line, 0);
     scrollPos(newPos);
 }
 
 // This can scroll less than one true line
 void KateViewInternal::scrollViewLines(int offset)
 {
     KTextEditor::Cursor c = viewLineOffset(startPos(), offset);
     scrollPos(c);
 
     bool blocked = m_lineScroll->blockSignals(true);
     m_lineScroll->setValue(startLine());
     m_lineScroll->blockSignals(blocked);
 }
 
 void KateViewInternal::scrollAction(int action)
 {
     switch (action) {
     case QAbstractSlider::SliderSingleStepAdd:
         scrollNextLine();
         break;
 
     case QAbstractSlider::SliderSingleStepSub:
         scrollPrevLine();
         break;
 
     case QAbstractSlider::SliderPageStepAdd:
         scrollNextPage();
         break;
 
     case QAbstractSlider::SliderPageStepSub:
         scrollPrevPage();
         break;
 
     case QAbstractSlider::SliderToMinimum:
         top_home();
         break;
 
     case QAbstractSlider::SliderToMaximum:
         bottom_end();
         break;
     }
 }
 
 void KateViewInternal::scrollNextPage()
 {
     scrollViewLines(qMax(linesDisplayed() - 1, 0));
 }
 
 void KateViewInternal::scrollPrevPage()
 {
     scrollViewLines(-qMax(linesDisplayed() - 1, 0));
 }
 
 void KateViewInternal::scrollPrevLine()
 {
     scrollViewLines(-1);
 }
 
 void KateViewInternal::scrollNextLine()
 {
     scrollViewLines(1);
 }
 
 KTextEditor::Cursor KateViewInternal::maxStartPos(bool changed)
 {
     cache()->setAcceptDirtyLayouts(true);
 
     if (m_cachedMaxStartPos.line() == -1 || changed) {
         KTextEditor::Cursor end(view()->textFolding().visibleLines() - 1,
                                 doc()->lineLength(view()->textFolding().visibleLineToLine(view()->textFolding().visibleLines() - 1)));
 
         if (view()->config()->scrollPastEnd()) {
             m_cachedMaxStartPos = viewLineOffset(end, -m_minLinesVisible);
         } else {
             m_cachedMaxStartPos = viewLineOffset(end, -(linesDisplayed() - 1));
         }
     }
 
     cache()->setAcceptDirtyLayouts(false);
 
     return m_cachedMaxStartPos;
 }
 
 // c is a virtual cursor
 void KateViewInternal::scrollPos(KTextEditor::Cursor &c, bool force, bool calledExternally, bool emitSignals)
 {
     if (!force && ((!view()->dynWordWrap() && c.line() == startLine()) || c == startPos())) {
         return;
     }
 
     if (c.line() < 0) {
         c.setLine(0);
     }
 
     KTextEditor::Cursor limit = maxStartPos();
     if (c > limit) {
         c = limit;
 
         // Re-check we're not just scrolling to the same place
         if (!force && ((!view()->dynWordWrap() && c.line() == startLine()) || c == startPos())) {
             return;
         }
     }
 
     int viewLinesScrolled = 0;
 
     // only calculate if this is really used and useful, could be wrong here, please recheck
     // for larger scrolls this makes 2-4 seconds difference on my xeon with dyn. word wrap on
     // try to get it really working ;)
     bool viewLinesScrolledUsable = !force && (c.line() >= startLine() - linesDisplayed() - 1) && (c.line() <= endLine() + linesDisplayed() + 1);
 
     if (viewLinesScrolledUsable) {
         viewLinesScrolled = cache()->displayViewLine(c);
     }
 
     m_startPos.setPosition(c);
 
     // set false here but reversed if we return to makeVisible
     m_madeVisible = false;
 
     if (viewLinesScrolledUsable) {
         int lines = linesDisplayed();
         if (view()->textFolding().visibleLines() < lines) {
             KTextEditor::Cursor end(view()->textFolding().visibleLines() - 1,
                                     doc()->lineLength(view()->textFolding().visibleLineToLine(view()->textFolding().visibleLines() - 1)));
             lines = qMin(linesDisplayed(), cache()->displayViewLine(end) + 1);
         }
 
         Q_ASSERT(lines >= 0);
 
         if (!calledExternally && qAbs(viewLinesScrolled) < lines &&
             // NOTE: on some machines we must update if the floating widget is visible
             //       otherwise strange painting bugs may occur during scrolling...
             !((view()->m_messageWidgets[KTextEditor::Message::TopInView] && view()->m_messageWidgets[KTextEditor::Message::TopInView]->isVisible())
               || (view()->m_messageWidgets[KTextEditor::Message::CenterInView] && view()->m_messageWidgets[KTextEditor::Message::CenterInView]->isVisible())
               || (view()->m_messageWidgets[KTextEditor::Message::BottomInView] && view()->m_messageWidgets[KTextEditor::Message::BottomInView]->isVisible()))) {
             updateView(false, viewLinesScrolled);
 
             int scrollHeight = -(viewLinesScrolled * (int)renderer()->lineHeight());
 
             // scroll excluding child widgets (floating notifications)
             scroll(0, scrollHeight, rect());
             m_leftBorder->scroll(0, scrollHeight);
 
             if (emitSignals) {
                 Q_EMIT view()->verticalScrollPositionChanged(m_view, c);
                 Q_EMIT view()->displayRangeChanged(m_view);
             }
             return;
         }
     }
 
     updateView();
     update();
     m_leftBorder->update();
     if (emitSignals) {
         Q_EMIT view()->verticalScrollPositionChanged(m_view, c);
         Q_EMIT view()->displayRangeChanged(m_view);
     }
 }
 
 void KateViewInternal::scrollColumns(int x)
 {
     if (x < 0) {
         x = 0;
     }
 
     if (x > m_columnScroll->maximum()) {
         x = m_columnScroll->maximum();
     }
 
     if (x == startX()) {
         return;
     }
 
     int dx = startX() - x;
     m_startX = x;
 
     if (qAbs(dx) < width()) {
         // scroll excluding child widgets (floating notifications)
         scroll(dx, 0, rect());
     } else {
         update();
     }
 
     Q_EMIT view()->horizontalScrollPositionChanged(m_view);
     Q_EMIT view()->displayRangeChanged(m_view);
 
     bool blocked = m_columnScroll->blockSignals(true);
     m_columnScroll->setValue(startX());
     m_columnScroll->blockSignals(blocked);
 }
 
 // If changed is true, the lines that have been set dirty have been updated.
 void KateViewInternal::updateView(bool changed, int viewLinesScrolled)
 {
     if (!isVisible() && !viewLinesScrolled && !changed) {
         return; // When this view is not visible, don't do anything
     }
 
     view()->doc()->delayAutoReload(); // Don't reload while user scrolls around
     bool blocked = m_lineScroll->blockSignals(true);
 
     int wrapWidth = width();
     if (view()->config()->dynWrapAtStaticMarker() && view()->config()->dynWordWrap()) {
         // We need to transform char count to a pixel width, stolen from PrintPainter::updateCache()
         QString s;
         s.fill(QLatin1Char('5'), view()->doc()->config()->wordWrapAt());
         wrapWidth = qMin(width(), static_cast<int>(renderer()->currentFontMetrics().boundingRect(s).width()));
     }
 
     if (wrapWidth != cache()->viewWidth()) {
         cache()->setViewWidth(wrapWidth);
         changed = true;
     }
 
     /* It was observed that height() could be negative here --
        when the main Kate view has 0 as size (during creation),
        and there frame around KateViewInternal.  In which
        case we'd set the view cache to 0 (or less!) lines, and
        start allocating huge chunks of data, later. */
     int newSize = (qMax(0, height()) / renderer()->lineHeight()) + 1;
     cache()->updateViewCache(startPos(), newSize, viewLinesScrolled);
     m_visibleLineCount = newSize;
 
     KTextEditor::Cursor maxStart = maxStartPos(changed);
     int maxLineScrollRange = maxStart.line();
     if (view()->dynWordWrap() && maxStart.column() != 0) {
         maxLineScrollRange++;
     }
     m_lineScroll->setRange(0, maxLineScrollRange);
 
     m_lineScroll->setValue(startLine());
     m_lineScroll->setSingleStep(1);
     m_lineScroll->setPageStep(qMax(0, height()) / renderer()->lineHeight());
     m_lineScroll->blockSignals(blocked);
 
     KateViewConfig::ScrollbarMode show_scrollbars = static_cast<KateViewConfig::ScrollbarMode>(view()->config()->showScrollbars());
 
     bool visible = ((show_scrollbars == KateViewConfig::AlwaysOn) || ((show_scrollbars == KateViewConfig::ShowWhenNeeded) && (maxLineScrollRange != 0)));
     bool visible_dummy = visible;
 
     m_lineScroll->setVisible(visible);
 
     if (!view()->dynWordWrap()) {
         int max = maxLen(startLine()) - width();
         if (max < 0) {
             max = 0;
         }
 
         // if we lose the ability to scroll horizontally, move view to the far-left
         if (max == 0) {
             scrollColumns(0);
         }
 
         blocked = m_columnScroll->blockSignals(true);
 
         // disable scrollbar
         m_columnScroll->setDisabled(max == 0);
 
         visible = ((show_scrollbars == KateViewConfig::AlwaysOn) || ((show_scrollbars == KateViewConfig::ShowWhenNeeded) && (max != 0)));
         visible_dummy &= visible;
         m_columnScroll->setVisible(visible);
 
         m_columnScroll->setRange(0, max + (renderer()->spaceWidth() / 2)); // Add some space for the caret at EOL
 
         m_columnScroll->setValue(startX());
 
         // Approximate linescroll
         m_columnScroll->setSingleStep(renderer()->currentFontMetrics().horizontalAdvance(QLatin1Char('a')));
         m_columnScroll->setPageStep(width());
 
         m_columnScroll->blockSignals(blocked);
     } else {
         visible_dummy = false;
     }
 
     m_dummy->setVisible(visible_dummy);
 
     if (changed) {
         updateDirty();
     }
 }
 
 /**
  * this function ensures a certain location is visible on the screen.
  * if endCol is -1, ignore making the columns visible.
  */
 void KateViewInternal::makeVisible(const KTextEditor::Cursor c, int endCol, bool force, bool center, bool calledExternally)
 {
     // qCDebug(LOG_KTE) << "MakeVisible start " << startPos() << " end " << endPos() << " -> request: " << c;// , new start [" << scroll.line << "," <<
     // scroll.col << "] lines " << (linesDisplayed() - 1) << " height " << height(); if the line is in a folded region, unfold all the way up if (
     // doc()->foldingTree()->findNodeForLine( c.line )->visible )
     //  qCDebug(LOG_KTE)<<"line ("<<c.line<<") should be visible";
 
     const int lnDisp = linesDisplayed();
     const int viewLine = cache()->displayViewLine(c, true);
     const bool curBelowScreen = (viewLine == -2);
 
     if (force) {
         KTextEditor::Cursor scroll = c;
         scrollPos(scroll, force, calledExternally);
     } else if (center && (c < startPos() || c > endPos())) {
         KTextEditor::Cursor scroll = viewLineOffset(c, -int(lnDisp) / 2);
         scrollPos(scroll, false, calledExternally);
     } else if ((viewLine >= (lnDisp - m_minLinesVisible)) || (curBelowScreen)) {
         KTextEditor::Cursor scroll = viewLineOffset(c, -(lnDisp - m_minLinesVisible - 1));
         scrollPos(scroll, false, calledExternally);
     } else if (c < viewLineOffset(startPos(), m_minLinesVisible)) {
         KTextEditor::Cursor scroll = viewLineOffset(c, -m_minLinesVisible);
         scrollPos(scroll, false, calledExternally);
     } else {
         // Check to see that we're not showing blank lines
         KTextEditor::Cursor max = maxStartPos();
         if (startPos() > max) {
             scrollPos(max, max.column(), calledExternally);
         }
     }
 
     if (!view()->dynWordWrap() && (endCol != -1 || view()->wrapCursor())) {
         KTextEditor::Cursor rc = toRealCursor(c);
         int sX = renderer()->cursorToX(cache()->textLayout(rc), rc, !view()->wrapCursor());
 
         int sXborder = sX - 8;
         if (sXborder < 0) {
             sXborder = 0;
         }
 
         if (sX < startX()) {
             scrollColumns(sXborder);
         } else if (sX > startX() + width()) {
             scrollColumns(sX - width() + 8);
         }
     }
 
     m_madeVisible = !force;
 
 #ifndef QT_NO_ACCESSIBILITY
     // FIXME -- is this needed?
 //    QAccessible::updateAccessibility(this, KateCursorAccessible::ChildId, QAccessible::Focus);
 #endif
 }
 
 void KateViewInternal::slotRegionVisibilityChanged()
 {
     qCDebug(LOG_KTE);
 
     // ensure the layout cache is ok for the updateCursor calls below
     // without the updateView() the view will jump to the bottom on hiding blocks after
     // change cfb0af25bdfac0d8f86b42db0b34a6bc9f9a361e
     cache()->clear();
     updateView();
 
     m_cachedMaxStartPos.setLine(-1);
     KTextEditor::Cursor max = maxStartPos();
     if (startPos() > max) {
         scrollPos(max, false, false, false /* don't emit signals! */);
     }
 
     // if text was folded: make sure the cursor is on a visible line
     qint64 foldedRangeId = -1;
     if (!view()->textFolding().isLineVisible(m_cursor.line(), &foldedRangeId)) {
         KTextEditor::Range foldingRange = view()->textFolding().foldingRange(foldedRangeId);
         Q_ASSERT(foldingRange.start().isValid());
 
         // set cursor to start of folding region
         updateCursor(foldingRange.start(), true);
     } else {
         // force an update of the cursor, since otherwise the m_displayCursor
         // line may be below the total amount of visible lines.
         updateCursor(m_cursor, true);
     }
 
     updateView();
     update();
     m_leftBorder->update();
 
     // emit signals here, scrollPos has this disabled, to ensure we do this after all stuff is updated!
     Q_EMIT view()->verticalScrollPositionChanged(m_view, max);
     Q_EMIT view()->displayRangeChanged(m_view);
 }
 
 void KateViewInternal::slotRegionBeginEndAddedRemoved(unsigned int)
 {
     qCDebug(LOG_KTE);
     // FIXME: performance problem
     m_leftBorder->update();
 }
 
 void KateViewInternal::showEvent(QShowEvent *e)
 {
     updateView();
 
     QWidget::showEvent(e);
 }
 
 KTextEditor::Attribute::Ptr KateViewInternal::attributeAt(const KTextEditor::Cursor position) const
 {
     KTextEditor::Attribute::Ptr attrib(new KTextEditor::Attribute());
 
     Kate::TextLine kateLine = doc()->kateTextLine(position.line());
     if (!kateLine) {
         return attrib;
     }
 
     *attrib = *m_view->renderer()->attribute(kateLine->attribute(position.column()));
 
     return attrib;
 }
 
 int KateViewInternal::linesDisplayed() const
 {
     int h = height();
 
     // catch zero heights, even if should not happen
     int fh = qMax(1, renderer()->lineHeight());
 
     // default to 1, there is always one line around....
     // too many places calc with linesDisplayed() - 1
     return qMax(1, (h - (h % fh)) / fh);
 }
 
 QPoint KateViewInternal::cursorToCoordinate(const KTextEditor::Cursor cursor, bool realCursor, bool includeBorder) const
 {
     if (cursor.line() >= doc()->lines()) {
         return QPoint(-1, -1);
     }
 
     int viewLine = cache()->displayViewLine(realCursor ? toVirtualCursor(cursor) : cursor, true);
 
     if (viewLine < 0 || viewLine >= cache()->viewCacheLineCount()) {
         return QPoint(-1, -1);
     }
 
     const int y = (int)viewLine * renderer()->lineHeight();
 
     KateTextLayout layout = cache()->viewLine(viewLine);
 
     if (cursor.column() > doc()->lineLength(cursor.line())) {
         return QPoint(-1, -1);
     }
 
     int x = 0;
 
     // only set x value if we have a valid layout (bug #171027)
     if (layout.isValid()) {
         x = (int)layout.lineLayout().cursorToX(cursor.column());
     }
     //  else
     //    qCDebug(LOG_KTE) << "Invalid Layout";
 
     if (includeBorder) {
         x += m_leftBorder->width();
     }
 
     x -= startX();
 
     return QPoint(x, y);
 }
 
 QPoint KateViewInternal::cursorCoordinates(bool includeBorder) const
 {
     return cursorToCoordinate(m_displayCursor, false, includeBorder);
 }
 
 KTextEditor::Cursor KateViewInternal::findMatchingBracket()
 {
     KTextEditor::Cursor c;
 
     if (!m_bm->toRange().isValid()) {
         return KTextEditor::Cursor::invalid();
     }
 
     Q_ASSERT(m_bmEnd->toRange().isValid());
     Q_ASSERT(m_bmStart->toRange().isValid());
 
     // For e.g. the text "{|}" (where | is the cursor), m_bmStart is equal to [ (0, 0)  ->  (0, 1) ]
     // and the closing bracket is in (0, 1). Thus, we check m_bmEnd first.
     if (m_bmEnd->toRange().contains(m_cursor) || m_bmEnd->end() == m_cursor.toCursor()) {
         c = m_bmStart->start();
     } else if (m_bmStart->toRange().contains(m_cursor) || m_bmStart->end() == m_cursor.toCursor()) {
         c = m_bmEnd->end();
         // We need to adjust the cursor position in case of override mode, BUG-402594
         if (doc()->config()->ovr()) {
             c.setColumn(c.column() - 1);
         }
     } else {
         // should never happen: a range exists, but the cursor position is
         // neither at the start nor at the end...
         return KTextEditor::Cursor::invalid();
     }
 
     return c;
 }
 
 class CalculatingCursor
 {
 public:
     // These constructors constrain their arguments to valid positions
     // before only the third one did, but that leads to crashes
     // see bug 227449
     CalculatingCursor(KateViewInternal *vi)
         : m_vi(vi)
     {
         makeValid();
     }
 
     CalculatingCursor(KateViewInternal *vi, const KTextEditor::Cursor c)
         : m_cursor(c)
         , m_vi(vi)
     {
         makeValid();
     }
 
     CalculatingCursor(KateViewInternal *vi, int line, int col)
         : m_cursor(line, col)
         , m_vi(vi)
     {
         makeValid();
     }
 
     virtual ~CalculatingCursor()
     {
     }
 
     int line() const
     {
         return m_cursor.line();
     }
 
     int column() const
     {
         return m_cursor.column();
     }
 
     operator KTextEditor::Cursor() const
     {
         return m_cursor;
     }
 
     virtual CalculatingCursor &operator+=(int n) = 0;
 
     virtual CalculatingCursor &operator-=(int n) = 0;
 
     CalculatingCursor &operator++()
     {
         return operator+=(1);
     }
 
     CalculatingCursor &operator--()
     {
         return operator-=(1);
     }
 
     void makeValid()
     {
         m_cursor.setLine(qBound(0, line(), int(doc()->lines() - 1)));
         if (view()->wrapCursor()) {
             m_cursor.setColumn(qBound(0, column(), doc()->lineLength(line())));
         } else {
             m_cursor.setColumn(qMax(0, column()));
         }
         Q_ASSERT(valid());
     }
 
     void toEdge(KateViewInternal::Bias bias)
     {
         if (bias == KateViewInternal::left) {
             m_cursor.setColumn(0);
         } else if (bias == KateViewInternal::right) {
             m_cursor.setColumn(doc()->lineLength(line()));
         }
     }
 
     bool atEdge() const
     {
         return atEdge(KateViewInternal::left) || atEdge(KateViewInternal::right);
     }
 
     bool atEdge(KateViewInternal::Bias bias) const
     {
         switch (bias) {
         case KateViewInternal::left:
             return column() == 0;
         case KateViewInternal::none:
             return atEdge();
         case KateViewInternal::right:
             return column() >= doc()->lineLength(line());
         default:
             Q_ASSERT(false);
             return false;
         }
     }
 
 protected:
     bool valid() const
     {
         return line() >= 0 && line() < doc()->lines() && column() >= 0 && (!view()->wrapCursor() || column() <= doc()->lineLength(line()));
     }
     KTextEditor::ViewPrivate *view()
     {
         return m_vi->m_view;
     }
     const KTextEditor::ViewPrivate *view() const
     {
         return m_vi->m_view;
     }
     KTextEditor::DocumentPrivate *doc()
     {
         return view()->doc();
     }
     const KTextEditor::DocumentPrivate *doc() const
     {
         return view()->doc();
     }
     KTextEditor::Cursor m_cursor;
     KateViewInternal *m_vi;
 };
 
 class BoundedCursor final : public CalculatingCursor
 {
 public:
     BoundedCursor(KateViewInternal *vi)
         : CalculatingCursor(vi)
     {
     }
     BoundedCursor(KateViewInternal *vi, const KTextEditor::Cursor c)
         : CalculatingCursor(vi, c)
     {
     }
     BoundedCursor(KateViewInternal *vi, int line, int col)
         : CalculatingCursor(vi, line, col)
     {
     }
     CalculatingCursor &operator+=(int n) override
     {
         KateLineLayoutPtr thisLine = m_vi->cache()->line(line());
         if (!thisLine->isValid()) {
             qCWarning(LOG_KTE) << "Did not retrieve valid layout for line " << line();
             return *this;
         }
 
         const bool wrapCursor = view()->wrapCursor();
         int maxColumn = -1;
         if (n >= 0) {
             for (int i = 0; i < n; i++) {
                 if (column() >= thisLine->length()) {
                     if (wrapCursor) {
                         break;
 
                     } else if (view()->dynWordWrap()) {
                         // Don't go past the edge of the screen in dynamic wrapping mode
                         if (maxColumn == -1) {
                             maxColumn = thisLine->length() + ((m_vi->width() - thisLine->widthOfLastLine()) / m_vi->renderer()->spaceWidth()) - 1;
                         }
 
                         if (column() >= maxColumn) {
                             m_cursor.setColumn(maxColumn);
                             break;
                         }
 
                         m_cursor.setColumn(column() + 1);
 
                     } else {
                         m_cursor.setColumn(column() + 1);
                     }
 
                 } else {
                     m_cursor.setColumn(thisLine->layout()->nextCursorPosition(column()));
                 }
             }
         } else {
             for (int i = 0; i > n; i--) {
                 if (column() >= thisLine->length()) {
                     m_cursor.setColumn(column() - 1);
                 } else if (column() == 0) {
                     break;
                 } else {
                     m_cursor.setColumn(thisLine->layout()->previousCursorPosition(column()));
                 }
             }
         }
 
         Q_ASSERT(valid());
         return *this;
     }
     CalculatingCursor &operator-=(int n) override
     {
         return operator+=(-n);
     }
 };
 
 class WrappingCursor final : public CalculatingCursor
 {
 public:
     WrappingCursor(KateViewInternal *vi)
         : CalculatingCursor(vi)
     {
     }
     WrappingCursor(KateViewInternal *vi, const KTextEditor::Cursor c)
         : CalculatingCursor(vi, c)
     {
     }
     WrappingCursor(KateViewInternal *vi, int line, int col)
         : CalculatingCursor(vi, line, col)
     {
     }
 
     CalculatingCursor &operator+=(int n) override
     {
         KateLineLayoutPtr thisLine = m_vi->cache()->line(line());
         if (!thisLine->isValid()) {
             qCWarning(LOG_KTE) << "Did not retrieve a valid layout for line " << line();
             return *this;
         }
 
         if (n >= 0) {
             for (int i = 0; i < n; i++) {
                 if (column() >= thisLine->length()) {
                     // Have come to the end of a line
                     if (line() >= doc()->lines() - 1)
                     // Have come to the end of the document
                     {
                         break;
                     }
 
                     // Advance to the beginning of the next line
                     m_cursor.setColumn(0);
                     m_cursor.setLine(line() + 1);
 
                     // Retrieve the next text range
                     thisLine = m_vi->cache()->line(line());
                     if (!thisLine->isValid()) {
                         qCWarning(LOG_KTE) << "Did not retrieve a valid layout for line " << line();
                         return *this;
                     }
 
                     continue;
                 }
 
                 m_cursor.setColumn(thisLine->layout()->nextCursorPosition(column()));
             }
 
         } else {
             for (int i = 0; i > n; i--) {
                 if (column() == 0) {
                     // Have come to the start of the document
                     if (line() == 0) {
                         break;
                     }
 
                     // Start going back to the end of the last line
                     m_cursor.setLine(line() - 1);
 
                     // Retrieve the next text range
                     thisLine = m_vi->cache()->line(line());
                     if (!thisLine->isValid()) {
                         qCWarning(LOG_KTE) << "Did not retrieve a valid layout for line " << line();
                         return *this;
                     }
 
                     // Finish going back to the end of the last line
                     m_cursor.setColumn(thisLine->length());
 
                     continue;
                 }
 
                 if (column() > thisLine->length()) {
                     m_cursor.setColumn(column() - 1);
                 } else {
                     m_cursor.setColumn(thisLine->layout()->previousCursorPosition(column()));
                 }
             }
         }
 
         Q_ASSERT(valid());
         return *this;
     }
     CalculatingCursor &operator-=(int n) override
     {
         return operator+=(-n);
     }
 };
 
 /**
  * @brief The CamelCursor class
  *
  * This class allows for "camel humps" when moving the cursor
  * using Ctrl + Left / Right. Similarly, this will also get triggered
  * when you press Ctrl+Shift+Left/Right for selection and Ctrl+Del
  * Ctrl + backspace for deletion.
  *
  * It is absoloutely essential that if you move through a word in 'n'
  * jumps, you should be able to move back with exactly same 'n' movements
  * which you made when moving forward. Example:
  *
  * Word: KateViewInternal
  *
  * Moving cursor towards right while holding control will result in cursor
  * landing in the following places (assuming you start from column 0)
  *
  *     |   |       |
  * KateViewInternal
  *
  * Moving the cursor back to get to the starting position should also
  * take exactly 3 movements:
  *
  * |   |   |
  * KateViewInternal
  *
  * In addition to simple camel case, this class also handles snake_case
  * capitalized snake, and mixtures of Camel + snake/underscore, for example
  * m_someMember. If a word has underscores in it, for example:
  *
  * snake_case_word
  *
  * the leading underscore is considered part of the word and thus a cursor
  * movement will land right after the underscore. Moving the cursor to end
  * for the above word should be like this:
  *
  * startpos: 0
  *       |    |   |
  * snake_case_word
  *
  * When jumping back to startpos, exact same "spots" need to be hit on your way
  * back.
  *
  * If a word has multiple leading underscores: snake___case, the underscores will
  * be considered part of the word and thus a jump wil land us "after" the last underscore.
  *
  * There are some other variations in this, for example Capitalized words, or identifiers
  * with numbers in betweens. For such cases, All capitalized words are skipped in one go
  * till we are on some "non-capitalized" word. In this context, a number is a non-capitalized
  * word so will break the jump. Examples:
  *
  *   | |
  * W1RD
  *
  * but for WORD_CAPITAL, following will happen:
  *
  *      |      |
  * WORD_CAPITAL
  *
  * The first case here is tricky to handle for reverse movement. I haven't noticed any
  * cases which the current implementation is unable to handle but there might be some.
  *
  * With languages like PHP where you have $ as part of the identifier, the cursor jump
  * will break "after" dollar. Consider: $phpVar, Following will happen:
  *
  *  |  |  |
  * $phpVar
  *
  * And of course, the reverse will be exact opposite.
  *
  * Similar to PHP, with CSS Colors, jump will break on '#' charachter
  *
  * Please see the test cases testWordMovementSingleRow() for more examples/data.
  *
  * It is absoloutely essential to know that this class *only* gets triggered for
  * cursor movement if we are in a word.
  *
  * Note to bugfixer: If some bug occurs, before changing anything please add a test
  * case for the bug and make sure everything passes before and after. The test case
  * for this can be found autotests/src/camelcursortest.cpp.
  *
  * @author Waqar Ahmed <waqar.17a@gmail.com>
  */
 class CamelCursor final : public CalculatingCursor
 {
 public:
     CamelCursor(KateViewInternal *vi, const KTextEditor::Cursor c)
         : CalculatingCursor(vi, c)
     {
     }
 
     CalculatingCursor &operator+=(int n) override
     {
         KateLineLayoutPtr thisLine = m_vi->cache()->line(line());
         if (!thisLine->isValid()) {
             qCWarning(LOG_KTE) << "Did not retrieve valid layout for line " << line();
             return *this;
         }
 
         auto isSurrogate = [](QChar c) {
             return c.isLowSurrogate() || c.isHighSurrogate();
         };
 
         if (n >= 0) {
             auto skipCaps = [](QStringView text, int &col) {
                 int count = 0;
                 while (col < text.size() && text.at(col).isUpper()) {
                     ++count;
                     ++col;
                 }
                 // if this is a letter, then it means we are in the
                 // middle of a word, step back one position so that
                 // we are at the last Cap letter
                 // Otherwise, it's an all cap word
                 if (count > 1 && col < text.size() && text.at(col).isLetterOrNumber()) {
                     --col;
                 }
             };
 
             int jump = -1;
             int col = column();
             const QString &text = thisLine->textLine()->text();
 
             if (col < text.size() && text.at(col).isUpper()) {
                 skipCaps(text, col);
             }
 
             for (int i = col; i < thisLine->length(); ++i) {
                 const auto c = text.at(i);
                 if (isSurrogate(c)) {
                     col++;
                     continue;
                 } else if (c.isUpper() || !c.isLetterOrNumber()) {
                     break;
                 }
                 ++col;
             }
 
             // eat any '_' that are after the word BEFORE any space happens
             if (col < text.size() && text.at(col) == QLatin1Char('_')) {
                 while (col < text.size() && text.at(col) == QLatin1Char('_')) {
                     ++col;
                 }
             }
 
             // Underscores eaten, so now eat any spaces till next word
             if (col < text.size() && text.at(col).isSpace()) {
                 while (col < text.size() && text.at(col).isSpace()) {
                     ++col;
                 }
             }
 
             jump = col < 0 || (column() == col) ? (column() + 1) : col;
             m_cursor.setColumn(jump);
         } else {
             int jump = -1;
 
             auto skipCapsRev = [](QStringView text, int &col) {
                 int count = 0;
                 while (col > 0 && text.at(col).isUpper()) {
                     ++count;
                     --col;
                 }
 
                 // if more than one cap found, and current
                 // column is not upper, we want to move ahead
                 // to the upper
                 if (count >= 1 && col >= 0 && !text.at(col).isUpper()) {
                     ++col;
                 }
             };
 
             const QString &text = thisLine->textLine()->text();
             int col = std::min<int>(column(), text.size() - 1);
             // decrement because we might be standing at a camel hump
             // already and don't want to return the same position
             col = col - 1;
 
             // if we are at the end of line
             if (column() == text.size()) {
                 // there is a letter before
                 if (text.at(col + 1).isLetter()) {
                     // and a space before that
                     if (col >= 0 && text.at(col).isSpace()) {
                         // we have a one letter word,
                         // so move forward to end of word
                         ++col;
                     }
                 }
             }
 
             // skip any spaces
             if (col > 0 && text.at(col).isSpace()) {
                 while (text.at(col).isSpace() && col > 0) {
                     --col;
                 }
             }
 
             // Skip Underscores
             if (col > 0 && text.at(col) == QLatin1Char('_')) {
                 while (col > 0 && text.at(col) == QLatin1Char('_')) {
                     --col;
                 }
             }
 
             if (col > 0 && text.at(col).isUpper()) {
                 skipCapsRev(text, col);
             }
 
             for (int i = col; i > 0; --i) {
                 const auto c = text.at(i);
                 if (isSurrogate(c)) {
                     --col;
                     continue;
                 } else if (c.isUpper() || !c.isLetterOrNumber()) {
                     break;
                 }
                 --col;
             }
 
             if (col >= 0 && !text.at(col).isLetterOrNumber() && !isSurrogate(text.at(col))) {
                 ++col;
             }
 
             if (col < 0) {
                 jump = 0;
             } else if (col == column() && column() > 0) {
                 jump = column() - 1;
             } else {
                 jump = col;
             }
 
             m_cursor.setColumn(jump);
         }
 
         Q_ASSERT(valid());
         return *this;
     }
 
     CalculatingCursor &operator-=(int n) override
     {
         return operator+=(-n);
     }
 };
 
 void KateViewInternal::moveChar(KateViewInternal::Bias bias, bool sel)
 {
     KTextEditor::Cursor c;
     if (view()->wrapCursor()) {
         c = WrappingCursor(this, m_cursor) += bias;
     } else {
         c = BoundedCursor(this, m_cursor) += bias;
     }
 
     const auto &sc = view()->m_secondaryCursors;
     QVarLengthArray<CursorPair, 16> multiCursors;
     const int lastLine = doc()->lastLine();
     bool shouldEnsureUniqueCursors = false;
     for (const auto &c : sc) {
         auto oldPos = c.cursor();
         if (view()->wrapCursor()) {
             c.pos->setPosition(WrappingCursor(this, oldPos) += bias);
         } else {
             c.pos->setPosition(BoundedCursor(this, oldPos) += bias);
         }
         const auto newPos = c.pos->toCursor();
         multiCursors.push_back({oldPos, newPos});
         // We only need to do this if cursors were in first or last line
         if (!shouldEnsureUniqueCursors) {
             shouldEnsureUniqueCursors = newPos.line() == 0 || newPos.line() == lastLine;
         }
     }
 
     updateSelection(c, sel);
     updateCursor(c);
     updateSecondaryCursors(multiCursors, sel);
     if (shouldEnsureUniqueCursors) {
         view()->ensureUniqueCursors();
     }
 }
 
 void KateViewInternal::cursorPrevChar(bool sel)
 {
     if (!view()->wrapCursor() && m_cursor.column() == 0) {
         return;
     }
 
     moveChar(KateViewInternal::left, sel);
 }
 
 void KateViewInternal::cursorNextChar(bool sel)
 {
     moveChar(KateViewInternal::right, sel);
 }
 
 void KateViewInternal::wordPrev(bool sel)
 {
     auto characterAtPreviousColumn = [this](KTextEditor::Cursor cursor) -> QChar {
         return doc()->characterAt({cursor.line(), cursor.column() - 1});
     };
 
     auto wordPrevious = [this, &characterAtPreviousColumn](KTextEditor::Cursor cursor) -> KTextEditor::Cursor {
         WrappingCursor c(this, cursor);
 
         // First we skip backwards all space.
         // Then we look up into which category the current position falls:
         // 1. a "word" character
         // 2. a "non-word" character (except space)
         // 3. the beginning of the line
         // and skip all preceding characters that fall into this class.
         // The code assumes that space is never part of the word character class.
 
         KateHighlighting *h = doc()->highlight();
 
         while (!c.atEdge(left) && (c.column() > doc()->lineLength(c.line()) || characterAtPreviousColumn(c).isSpace())) {
             --c;
         }
 
         if (c.atEdge(left)) {
             --c;
         } else if (h->isInWord(characterAtPreviousColumn(c))) {
             if (doc()->config()->camelCursor()) {
                 CamelCursor cc(this, cursor);
                 --cc;
                 return cc;
             } else {
                 while (!c.atEdge(left) && h->isInWord(characterAtPreviousColumn(c))) {
                     --c;
                 }
             }
         } else {
             while (!c.atEdge(left)
                    && !h->isInWord(characterAtPreviousColumn(c))
                    // in order to stay symmetric to wordLeft()
                    // we must not skip space preceding a non-word sequence
                    && !characterAtPreviousColumn(c).isSpace()) {
                 --c;
             }
         }
 
         return c;
     };
 
     const auto &secondaryCursors = view()->m_secondaryCursors;
     QVarLengthArray<CursorPair, 16> cursorsToUpdate;
     for (const auto &cursor : secondaryCursors) {
         auto oldPos = cursor.cursor();
         auto newCursorPos = wordPrevious(cursor.cursor());
         cursor.pos->setPosition(newCursorPos);
         cursorsToUpdate.push_back({oldPos, newCursorPos});
     }
 
     // update primary cursor
     const auto c = wordPrevious(m_cursor);
     updateSelection(c, sel);
     updateCursor(c);
 
     if (!sel) {
         view()->ensureUniqueCursors();
     }
     updateSecondaryCursors(cursorsToUpdate, sel);
 }
 
 void KateViewInternal::wordNext(bool sel)
 {
     auto nextWord = [this](KTextEditor::Cursor cursor) -> KTextEditor::Cursor {
         WrappingCursor c(this, cursor);
 
         // We look up into which category the current position falls:
         // 1. a "word" character
         // 2. a "non-word" character (except space)
         // 3. the end of the line
         // and skip all following characters that fall into this class.
         // If the skipped characters are followed by space, we skip that too.
         // The code assumes that space is never part of the word character class.
 
         KateHighlighting *h = doc()->highlight();
         if (c.atEdge(right)) {
             ++c;
         } else if (h->isInWord(doc()->characterAt(c))) {
             if (doc()->config()->camelCursor()) {
                 CamelCursor cc(this, cursor);
                 ++cc;
                 return cc;
             } else {
                 while (!c.atEdge(right) && h->isInWord(doc()->characterAt(c))) {
                     ++c;
                 }
             }
         } else {
             while (!c.atEdge(right)
                    && !h->isInWord(doc()->characterAt(c))
                    // we must not skip space, because if that space is followed
                    // by more non-word characters, we would skip them, too
                    && !doc()->characterAt(c).isSpace()) {
                 ++c;
             }
         }
 
         while (!c.atEdge(right) && doc()->characterAt(c).isSpace()) {
             ++c;
         }
 
         return c;
     };
 
     const auto &secondaryCursors = view()->m_secondaryCursors;
     QVarLengthArray<CursorPair, 16> cursorsToUpdate;
     for (const auto &cursor : secondaryCursors) {
         auto oldPos = cursor.cursor();
         auto newCursorPos = nextWord(cursor.cursor());
         cursor.pos->setPosition(newCursorPos);
         cursorsToUpdate.push_back({oldPos, newCursorPos});
     }
 
     // update primary cursor
     const auto c = nextWord(m_cursor);
     updateSelection(c, sel);
     updateCursor(c);
 
     // Remove cursors which have same position
     if (!sel) {
         view()->ensureUniqueCursors();
     }
     updateSecondaryCursors(cursorsToUpdate, sel);
 }
 
 void KateViewInternal::moveEdge(KateViewInternal::Bias bias, bool sel)
 {
     BoundedCursor c(this, m_cursor);
     c.toEdge(bias);
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 KTextEditor::Cursor KateViewInternal::moveCursorToLineStart(KTextEditor::Cursor cursor)
 {
     if (view()->dynWordWrap() && currentLayout(cursor).startCol()) {
         // Allow us to go to the real start if we're already at the start of the view line
         if (m_cursor.column() != currentLayout(cursor).startCol()) {
             KTextEditor::Cursor c = currentLayout(cursor).start();
             return c;
         }
     }
 
     if (!doc()->config()->smartHome()) {
         BoundedCursor c(this, cursor);
         c.toEdge(left);
         return c;
     }
 
     Kate::TextLine l = doc()->kateTextLine(cursor.line());
 
     if (!l) {
         return KTextEditor::Cursor::invalid();
     }
 
     KTextEditor::Cursor c = cursor;
     int lc = l->firstChar();
 
     if (lc < 0 || c.column() == lc) {
         c.setColumn(0);
     } else {
         c.setColumn(lc);
     }
     return c;
 }
 
 void KateViewInternal::home(bool sel)
 {
     // Multicursor
     view()->ensureUniqueCursors(/*matchLine*/ true);
     const auto &secondaryCursors = view()->m_secondaryCursors;
     QVarLengthArray<CursorPair, 16> cursorsToUpdate;
     for (const auto &c : secondaryCursors) {
         auto oldPos = c.cursor();
         // These will end up in same place so just remove
         auto newPos = moveCursorToLineStart(oldPos);
         c.pos->setPosition(newPos);
         cursorsToUpdate.push_back({oldPos, newPos});
     }
 
     // Primary cursor
     auto newPos = moveCursorToLineStart(m_cursor);
     if (newPos.isValid()) {
         updateSelection(newPos, sel);
         updateCursor(newPos, true);
     }
     updateSecondaryCursors(cursorsToUpdate, sel);
 }
 
 KTextEditor::Cursor KateViewInternal::moveCursorToLineEnd(KTextEditor::Cursor cursor)
 {
     KateTextLayout layout = currentLayout(cursor);
 
     if (view()->dynWordWrap() && layout.wrap()) {
         // Allow us to go to the real end if we're already at the end of the view line
         if (cursor.column() < layout.endCol() - 1) {
             KTextEditor::Cursor c(cursor.line(), layout.endCol() - 1);
             return c;
         }
     }
 
     if (!doc()->config()->smartHome()) {
         BoundedCursor c(this, cursor);
         c.toEdge(right);
         return c;
     }
 
     Kate::TextLine l = doc()->kateTextLine(cursor.line());
 
     if (!l) {
         return KTextEditor::Cursor::invalid();
     }
 
     // "Smart End", as requested in bugs #78258 and #106970
     if (cursor.column() == doc()->lineLength(cursor.line())) {
         KTextEditor::Cursor c = cursor;
         c.setColumn(l->lastChar() + 1);
         return c;
     } else {
         BoundedCursor c(this, cursor);
         c.toEdge(right);
         return c;
     }
 }
 
 void KateViewInternal::end(bool sel)
 {
     // Multicursor
     view()->ensureUniqueCursors(/*matchLine*/ true);
 
     QVarLengthArray<CursorPair, 16> cursorsToUpdate;
     const auto &secondaryCursors = view()->m_secondaryCursors;
     for (const auto &c : secondaryCursors) {
         auto oldPos = c.cursor();
         // These will end up in same place so just remove
         auto newPos = moveCursorToLineEnd(oldPos);
         c.pos->setPosition(newPos);
         cursorsToUpdate.push_back({oldPos, newPos});
     }
 
     auto newPos = moveCursorToLineEnd(m_cursor);
     if (newPos.isValid()) {
         updateSelection(newPos, sel);
         updateCursor(newPos);
     }
 
     updateSecondaryCursors(cursorsToUpdate, sel);
     paintCursor();
 }
 
 KateTextLayout KateViewInternal::currentLayout(KTextEditor::Cursor c) const
 {
     return cache()->textLayout(c);
 }
 
 KateTextLayout KateViewInternal::previousLayout(KTextEditor::Cursor c) const
 {
     int currentViewLine = cache()->viewLine(c);
 
     if (currentViewLine) {
         return cache()->textLayout(c.line(), currentViewLine - 1);
     } else {
         return cache()->textLayout(view()->textFolding().visibleLineToLine(toVirtualCursor(c).line() - 1), -1);
     }
 }
 
 KateTextLayout KateViewInternal::nextLayout(KTextEditor::Cursor c) const
 {
     int currentViewLine = cache()->viewLine(c) + 1;
 
     if (currentViewLine >= cache()->line(c.line())->viewLineCount()) {
         currentViewLine = 0;
         return cache()->textLayout(view()->textFolding().visibleLineToLine(toVirtualCursor(c).line() + 1), currentViewLine);
     } else {
         return cache()->textLayout(c.line(), currentViewLine);
     }
 }
 
 /*
  * This returns the cursor which is offset by (offset) view lines.
  * This is the main function which is called by code not specifically dealing with word-wrap.
  * The opposite conversion (cursor to offset) can be done with cache()->displayViewLine().
  *
  * The cursors involved are virtual cursors (ie. equivalent to m_displayCursor)
  */
 
 KTextEditor::Cursor KateViewInternal::viewLineOffset(const KTextEditor::Cursor virtualCursor, int offset, bool keepX)
 {
     if (!view()->dynWordWrap()) {
         KTextEditor::Cursor ret(qMin((int)view()->textFolding().visibleLines() - 1, virtualCursor.line() + offset), 0);
 
         if (ret.line() < 0) {
             ret.setLine(0);
         }
 
         if (keepX) {
             int realLine = view()->textFolding().visibleLineToLine(ret.line());
             KateTextLayout t = cache()->textLayout(realLine, 0);
             Q_ASSERT(t.isValid());
 
             ret.setColumn(renderer()->xToCursor(t, m_preservedX, !view()->wrapCursor()).column());
         }
 
         return ret;
     }
 
     KTextEditor::Cursor realCursor = virtualCursor;
     realCursor.setLine(view()->textFolding().visibleLineToLine(view()->textFolding().lineToVisibleLine(virtualCursor.line())));
 
     int cursorViewLine = cache()->viewLine(realCursor);
 
     int currentOffset = 0;
     int virtualLine = 0;
 
     bool forwards = (offset > 0) ? true : false;
 
     if (forwards) {
         currentOffset = cache()->lastViewLine(realCursor.line()) - cursorViewLine;
         if (offset <= currentOffset) {
             // the answer is on the same line
             KateTextLayout thisLine = cache()->textLayout(realCursor.line(), cursorViewLine + offset);
             Q_ASSERT(thisLine.virtualLine() == (int)view()->textFolding().lineToVisibleLine(virtualCursor.line()));
             return KTextEditor::Cursor(virtualCursor.line(), thisLine.startCol());
         }
 
         virtualLine = virtualCursor.line() + 1;
 
     } else {
         offset = -offset;
         currentOffset = cursorViewLine;
         if (offset <= currentOffset) {
             // the answer is on the same line
             KateTextLayout thisLine = cache()->textLayout(realCursor.line(), cursorViewLine - offset);
             Q_ASSERT(thisLine.virtualLine() == (int)view()->textFolding().lineToVisibleLine(virtualCursor.line()));
             return KTextEditor::Cursor(virtualCursor.line(), thisLine.startCol());
         }
 
         virtualLine = virtualCursor.line() - 1;
     }
 
     currentOffset++;
 
     while (virtualLine >= 0 && virtualLine < (int)view()->textFolding().visibleLines()) {
         int realLine = view()->textFolding().visibleLineToLine(virtualLine);
         KateLineLayoutPtr thisLine = cache()->line(realLine, virtualLine);
         if (!thisLine) {
             break;
         }
 
         for (int i = 0; i < thisLine->viewLineCount(); ++i) {
             if (offset == currentOffset) {
                 KateTextLayout thisViewLine = thisLine->viewLine(i);
 
                 if (!forwards) {
                     // We actually want it the other way around
                     int requiredViewLine = cache()->lastViewLine(realLine) - thisViewLine.viewLine();
                     if (requiredViewLine != thisViewLine.viewLine()) {
                         thisViewLine = thisLine->viewLine(requiredViewLine);
                     }
                 }
 
                 KTextEditor::Cursor ret(virtualLine, thisViewLine.startCol());
 
                 // keep column position
                 if (keepX) {
                     KTextEditor::Cursor realCursor = toRealCursor(virtualCursor);
                     KateTextLayout t = cache()->textLayout(realCursor);
                     // renderer()->cursorToX(t, realCursor, !view()->wrapCursor());
 
                     realCursor = renderer()->xToCursor(thisViewLine, m_preservedX, !view()->wrapCursor());
                     ret.setColumn(realCursor.column());
                 }
 
                 return ret;
             }
 
             currentOffset++;
         }
 
         if (forwards) {
             virtualLine++;
         } else {
             virtualLine--;
         }
     }
 
     // Looks like we were asked for something a bit exotic.
     // Return the max/min valid position.
     if (forwards) {
         return KTextEditor::Cursor(view()->textFolding().visibleLines() - 1,
                                    doc()->lineLength(view()->textFolding().visibleLineToLine(view()->textFolding().visibleLines() - 1)));
     } else {
         return KTextEditor::Cursor(0, 0);
     }
 }
 
 int KateViewInternal::lineMaxCursorX(const KateTextLayout &range)
 {
     if (!view()->wrapCursor() && !range.wrap()) {
         return INT_MAX;
     }
 
     int maxX = range.endX();
 
     if (maxX && range.wrap()) {
         QChar lastCharInLine = doc()->kateTextLine(range.line())->at(range.endCol() - 1);
         maxX -= renderer()->currentFontMetrics().horizontalAdvance(lastCharInLine);
     }
 
     return maxX;
 }
 
 int KateViewInternal::lineMaxCol(const KateTextLayout &range)
 {
     int maxCol = range.endCol();
 
     if (maxCol && range.wrap()) {
         maxCol--;
     }
 
     return maxCol;
 }
 
 void KateViewInternal::cursorUp(bool sel)
 {
     if (!sel && view()->completionWidget()->isCompletionActive()) {
         view()->completionWidget()->cursorUp();
         return;
     }
 
     m_preserveX = true;
 
     // Handle Multi cursors
     // usually this will have only one element, rarely
     int i = 0;
     for (const auto &c : view()->m_secondaryCursors) {
         auto cursor = c.pos->toCursor();
         auto vCursor = toVirtualCursor(cursor);
 
         // our cursor is in the first line already
         if (vCursor.line() == 0 && (!view()->dynWordWrap() || cache()->viewLine(cursor) == 0)) {
             auto newPos = moveCursorToLineStart(cursor);
             c.pos->setPosition(newPos);
             auto newVcursor = toVirtualCursor(newPos);
             if (sel) {
                 updateSecondarySelection(i, cursor, newPos);
             } else {
                 view()->clearSecondarySelections();
             }
             tagLines(newVcursor.line(), vCursor.line());
             i++;
             continue;
         }
 
         auto lineLayout = currentLayout(cursor);
         Q_ASSERT(lineLayout.line() == cursor.line());
         Q_ASSERT(lineLayout.startCol() <= cursor.column());
         Q_ASSERT(!lineLayout.wrap() || cursor.column() < lineLayout.endCol());
 
         KateTextLayout pRange = previousLayout(cursor);
 
         KTextEditor::Cursor newPos = renderer()->xToCursor(pRange, m_preservedX, !view()->wrapCursor());
         c.pos->setPosition(newPos);
 
         auto newVcursor = toVirtualCursor(newPos);
         if (sel) {
             updateSecondarySelection(i, cursor, newPos);
         } else {
             view()->clearSecondarySelections();
         }
         tagLines(newVcursor.line(), vCursor.line());
         i++;
     }
 
     auto mergeOnFuncEnd = qScopeGuard([this, sel] {
         if (sel) {
             mergeSelections();
         } else {
             view()->ensureUniqueCursors();
         }
     });
 
     // Normal single cursor
 
     // assert that the display cursor is in visible lines
     Q_ASSERT(m_displayCursor.line() < view()->textFolding().visibleLines());
 
     // move cursor to start of line, if we are at first line!
     if (m_displayCursor.line() == 0 && (!view()->dynWordWrap() || cache()->viewLine(m_cursor) == 0)) {
         auto newPos = moveCursorToLineStart(m_cursor);
         if (newPos.isValid()) {
             updateSelection(newPos, sel);
             updateCursor(newPos, true);
         }
         return;
     }
 
     KateTextLayout thisLine = currentLayout(m_cursor);
     // This is not the first line because that is already simplified out above
     KateTextLayout pRange = previousLayout(m_cursor);
 
     // Ensure we're in the right spot
     Q_ASSERT(m_cursor.line() == thisLine.line());
     Q_ASSERT(m_cursor.column() >= thisLine.startCol());
     Q_ASSERT(!thisLine.wrap() || m_cursor.column() < thisLine.endCol());
 
     KTextEditor::Cursor c = renderer()->xToCursor(pRange, m_preservedX, !view()->wrapCursor());
 
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 void KateViewInternal::cursorDown(bool sel)
 {
     if (!sel && view()->completionWidget()->isCompletionActive()) {
         view()->completionWidget()->cursorDown();
         return;
     }
 
     m_preserveX = true;
 
     // Handle multiple cursors
     int i = 0;
     for (const auto &c : view()->m_secondaryCursors) {
         auto cursor = c.cursor();
         auto vCursor = toVirtualCursor(cursor);
 
         // at end?
         if ((vCursor.line() >= view()->textFolding().visibleLines() - 1)
             && (!view()->dynWordWrap() || cache()->viewLine(cursor) == cache()->lastViewLine(cursor.line()))) {
             KTextEditor::Cursor newPos = moveCursorToLineEnd(cursor);
             c.pos->setPosition(newPos);
             if (sel) {
                 updateSecondarySelection(i, cursor, newPos);
             } else {
                 view()->clearSecondarySelections();
             }
             auto vNewPos = toVirtualCursor(newPos);
             tagLines(vCursor.line(), vNewPos.line());
             i++;
             continue;
         }
 
         KateTextLayout thisLine = currentLayout(cursor);
         // This is not the last line because that is already simplified out above
         KateTextLayout nRange = nextLayout(cursor);
 
         // Ensure we're in the right spot
         Q_ASSERT((cursor.line() == thisLine.line()) && (cursor.column() >= thisLine.startCol()) && (!thisLine.wrap() || cursor.column() < thisLine.endCol()));
         KTextEditor::Cursor newPos = renderer()->xToCursor(nRange, m_preservedX, !view()->wrapCursor());
 
         c.pos->setPosition(newPos);
         if (sel) {
             updateSecondarySelection(i, cursor, newPos);
         } else {
             view()->clearSecondarySelections();
         }
         auto vNewPos = toVirtualCursor(newPos);
         tagLines(vCursor.line(), vNewPos.line());
         i++;
     }
     auto mergeOnFuncEnd = qScopeGuard([this, sel] {
         if (sel) {
             mergeSelections();
         } else {
             view()->ensureUniqueCursors();
         }
     });
 
     // Handle normal single cursor
 
     // move cursor to end of line, if we are at last line!
     if ((m_displayCursor.line() >= view()->textFolding().visibleLines() - 1)
         && (!view()->dynWordWrap() || cache()->viewLine(m_cursor) == cache()->lastViewLine(m_cursor.line()))) {
         auto newPos = moveCursorToLineEnd(m_cursor);
         if (newPos.isValid()) {
             updateSelection(newPos, sel);
             updateCursor(newPos);
         }
         return;
     }
 
     KateTextLayout thisLine = currentLayout(m_cursor);
     // This is not the last line because that is already simplified out above
     KateTextLayout nRange = nextLayout(m_cursor);
 
     // Ensure we're in the right spot
     Q_ASSERT((m_cursor.line() == thisLine.line()) && (m_cursor.column() >= thisLine.startCol()) && (!thisLine.wrap() || m_cursor.column() < thisLine.endCol()));
 
     KTextEditor::Cursor c = renderer()->xToCursor(nRange, m_preservedX, !view()->wrapCursor());
 
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 void KateViewInternal::cursorToMatchingBracket(bool sel)
 {
     KTextEditor::Cursor c = findMatchingBracket();
 
     if (c.isValid()) {
         updateSelection(c, sel);
         updateCursor(c);
     }
 }
 
 void KateViewInternal::topOfView(bool sel)
 {
     view()->clearSecondaryCursors();
     KTextEditor::Cursor c = viewLineOffset(startPos(), m_minLinesVisible);
     updateSelection(toRealCursor(c), sel);
     updateCursor(toRealCursor(c));
 }
 
 void KateViewInternal::bottomOfView(bool sel)
 {
     view()->clearSecondaryCursors();
     KTextEditor::Cursor c = viewLineOffset(endPos(), -m_minLinesVisible);
     updateSelection(toRealCursor(c), sel);
     updateCursor(toRealCursor(c));
 }
 
 // lines is the offset to scroll by
 void KateViewInternal::scrollLines(int lines, bool sel)
 {
     KTextEditor::Cursor c = viewLineOffset(m_displayCursor, lines, true);
 
     // Fix the virtual cursor -> real cursor
     c.setLine(view()->textFolding().visibleLineToLine(c.line()));
 
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 // This is a bit misleading... it's asking for the view to be scrolled, not the cursor
 void KateViewInternal::scrollUp()
 {
     KTextEditor::Cursor newPos = viewLineOffset(startPos(), -1);
     scrollPos(newPos);
 }
 
 void KateViewInternal::scrollDown()
 {
     KTextEditor::Cursor newPos = viewLineOffset(startPos(), 1);
     scrollPos(newPos);
 }
 
 void KateViewInternal::setAutoCenterLines(int viewLines, bool updateView)
 {
     m_autoCenterLines = viewLines;
     m_minLinesVisible = qMin(int((linesDisplayed() - 1) / 2), m_autoCenterLines);
     if (updateView) {
         KateViewInternal::updateView();
     }
 }
 
 void KateViewInternal::pageUp(bool sel, bool half)
 {
     if (view()->isCompletionActive()) {
         view()->completionWidget()->pageUp();
         return;
     }
     view()->clearSecondaryCursors();
 
     // remember the view line and x pos
     int viewLine = cache()->displayViewLine(m_displayCursor);
     bool atTop = startPos().atStartOfDocument();
 
     // Adjust for an auto-centering cursor
     int lineadj = m_minLinesVisible;
 
     int linesToScroll;
     if (!half) {
         linesToScroll = -qMax((linesDisplayed() - 1) - lineadj, 0);
     } else {
         linesToScroll = -qMax((linesDisplayed() / 2 - 1) - lineadj, 0);
     }
 
     m_preserveX = true;
 
     if (!doc()->pageUpDownMovesCursor() && !atTop) {
         KTextEditor::Cursor newStartPos = viewLineOffset(startPos(), linesToScroll - 1);
         scrollPos(newStartPos);
 
         // put the cursor back approximately where it was
         KTextEditor::Cursor newPos = toRealCursor(viewLineOffset(newStartPos, viewLine, true));
 
         KateTextLayout newLine = cache()->textLayout(newPos);
 
         newPos = renderer()->xToCursor(newLine, m_preservedX, !view()->wrapCursor());
 
         m_preserveX = true;
         updateSelection(newPos, sel);
         updateCursor(newPos);
 
     } else {
         scrollLines(linesToScroll, sel);
     }
 }
 
 void KateViewInternal::pageDown(bool sel, bool half)
 {
     if (view()->isCompletionActive()) {
         view()->completionWidget()->pageDown();
         return;
     }
 
     view()->clearSecondaryCursors();
 
     // remember the view line
     int viewLine = cache()->displayViewLine(m_displayCursor);
     bool atEnd = startPos() >= m_cachedMaxStartPos;
 
     // Adjust for an auto-centering cursor
     int lineadj = m_minLinesVisible;
 
     int linesToScroll;
     if (!half) {
         linesToScroll = qMax((linesDisplayed() - 1) - lineadj, 0);
     } else {
         linesToScroll = qMax((linesDisplayed() / 2 - 1) - lineadj, 0);
     }
 
     m_preserveX = true;
 
     if (!doc()->pageUpDownMovesCursor() && !atEnd) {
         KTextEditor::Cursor newStartPos = viewLineOffset(startPos(), linesToScroll + 1);
         scrollPos(newStartPos);
 
         // put the cursor back approximately where it was
         KTextEditor::Cursor newPos = toRealCursor(viewLineOffset(newStartPos, viewLine, true));
 
         KateTextLayout newLine = cache()->textLayout(newPos);
 
         newPos = renderer()->xToCursor(newLine, m_preservedX, !view()->wrapCursor());
 
         m_preserveX = true;
         updateSelection(newPos, sel);
         updateCursor(newPos);
 
     } else {
         scrollLines(linesToScroll, sel);
     }
 }
 
 int KateViewInternal::maxLen(int startLine)
 {
     Q_ASSERT(!view()->dynWordWrap());
 
     int displayLines = (view()->height() / renderer()->lineHeight()) + 1;
 
     int maxLen = 0;
 
     for (int z = 0; z < displayLines; z++) {
         int virtualLine = startLine + z;
 
         if (virtualLine < 0 || virtualLine >= (int)view()->textFolding().visibleLines()) {
             break;
         }
 
         maxLen = qMax(maxLen, cache()->line(view()->textFolding().visibleLineToLine(virtualLine))->width());
     }
 
     return maxLen;
 }
 
 bool KateViewInternal::columnScrollingPossible()
 {
     return !view()->dynWordWrap() && m_columnScroll->isEnabled() && (m_columnScroll->maximum() > 0);
 }
 
 bool KateViewInternal::lineScrollingPossible()
 {
     return m_lineScroll->minimum() != m_lineScroll->maximum();
 }
 
 void KateViewInternal::top(bool sel)
 {
     KTextEditor::Cursor newCursor(0, 0);
 
     newCursor = renderer()->xToCursor(cache()->textLayout(newCursor), m_preservedX, !view()->wrapCursor());
 
     view()->clearSecondaryCursors();
     updateSelection(newCursor, sel);
     updateCursor(newCursor);
 }
 
 void KateViewInternal::bottom(bool sel)
 {
     KTextEditor::Cursor newCursor(doc()->lastLine(), 0);
 
     newCursor = renderer()->xToCursor(cache()->textLayout(newCursor), m_preservedX, !view()->wrapCursor());
 
     view()->clearSecondaryCursors();
     updateSelection(newCursor, sel);
     updateCursor(newCursor);
 }
 
 void KateViewInternal::top_home(bool sel)
 {
     if (view()->isCompletionActive()) {
         view()->completionWidget()->top();
         return;
     }
 
     view()->clearSecondaryCursors();
     KTextEditor::Cursor c(0, 0);
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 void KateViewInternal::bottom_end(bool sel)
 {
     if (view()->isCompletionActive()) {
         view()->completionWidget()->bottom();
         return;
     }
 
     view()->clearSecondaryCursors();
     KTextEditor::Cursor c(doc()->lastLine(), doc()->lineLength(doc()->lastLine()));
     updateSelection(c, sel);
     updateCursor(c);
 }
 
 void KateViewInternal::updateSecondarySelection(int cursorIdx, KTextEditor::Cursor old, KTextEditor::Cursor newPos)
 {
     if (m_selectionMode != SelectionMode::Default) {
         view()->clearSecondaryCursors();
     }
 
     auto &secondaryCursors = view()->m_secondaryCursors;
     if (secondaryCursors.empty()) {
         qWarning() << "Invalid updateSecondarySelection with no secondaryCursors";
         return;
     }
     Q_ASSERT(secondaryCursors.size() > (size_t)cursorIdx);
 
     auto &cursor = secondaryCursors[cursorIdx];
     if (cursor.cursor() != newPos) {
         qWarning() << "Unexpected different cursor at cursorIdx" << cursorIdx << "found" << cursor.cursor() << "looking for: " << newPos;
         return;
     }
 
     if (cursor.range) {
         Q_ASSERT(cursor.anchor.isValid());
         cursor.range->setRange(cursor.anchor, newPos);
     } else {
         cursor.range.reset(view()->newSecondarySelectionRange({old, newPos}));
         cursor.anchor = old;
     }
 }
 
 void KateViewInternal::updateSelection(const KTextEditor::Cursor _newCursor, bool keepSel)
 {
     KTextEditor::Cursor newCursor = _newCursor;
     if (keepSel) {
         if (!view()->selection()
             || (m_selectAnchor.line() == -1)
             // don't kill the selection if we have a persistent selection and
             // the cursor is inside or at the boundaries of the selected area
             || (view()->config()->persistentSelection()
                 && !(view()->selectionRange().contains(m_cursor) || view()->selectionRange().boundaryAtCursor(m_cursor)))) {
             m_selectAnchor = m_cursor;
             setSelection(KTextEditor::Range(m_cursor, newCursor));
         } else {
             bool doSelect = true;
             switch (m_selectionMode) {
             case Word: {
                 // Restore selStartCached if needed. It gets nuked by
                 // viewSelectionChanged if we drag the selection into non-existence,
                 // which can legitimately happen if a shift+DC selection is unable to
                 // set a "proper" (i.e. non-empty) cached selection, e.g. because the
                 // start was on something that isn't a word. Word select mode relies
                 // on the cached selection being set properly, even if it is empty
                 // (i.e. selStartCached == selEndCached).
                 if (!m_selectionCached.isValid()) {
                     m_selectionCached.setStart(m_selectionCached.end());
                 }
 
                 int c;
                 if (newCursor > m_selectionCached.start()) {
                     m_selectAnchor = m_selectionCached.start();
 
                     Kate::TextLine l = doc()->kateTextLine(newCursor.line());
 
                     c = newCursor.column();
                     if (c > 0 && doc()->highlight()->isInWord(l->at(c - 1))) {
                         for (; c < l->length(); c++) {
                             if (!doc()->highlight()->isInWord(l->at(c))) {
                                 break;
                             }
                         }
                     }
 
                     newCursor.setColumn(c);
                 } else if (newCursor < m_selectionCached.start()) {
                     m_selectAnchor = m_selectionCached.end();
 
                     Kate::TextLine l = doc()->kateTextLine(newCursor.line());
 
                     c = newCursor.column();
                     if (c > 0 && c < doc()->lineLength(newCursor.line()) && doc()->highlight()->isInWord(l->at(c))
                         && doc()->highlight()->isInWord(l->at(c - 1))) {
                         for (c -= 2; c >= 0; c--) {
                             if (!doc()->highlight()->isInWord(l->at(c))) {
                                 break;
                             }
                         }
                         newCursor.setColumn(c + 1);
                     }
                 } else {
                     doSelect = false;
                 }
 
             } break;
             case Line:
                 if (!m_selectionCached.isValid()) {
                     m_selectionCached = KTextEditor::Range(endLine(), 0, endLine(), 0);
                 }
                 if (newCursor.line() > m_selectionCached.start().line()) {
                     if (newCursor.line() + 1 >= doc()->lines()) {
                         newCursor.setColumn(doc()->line(newCursor.line()).length());
                     } else {
                         newCursor.setPosition(newCursor.line() + 1, 0);
                     }
                     // Grow to include the entire line
                     m_selectAnchor = m_selectionCached.start();
                     m_selectAnchor.setColumn(0);
                 } else if (newCursor.line() < m_selectionCached.start().line()) {
                     newCursor.setColumn(0);
                     // Grow to include entire line
                     m_selectAnchor = m_selectionCached.end();
                     if (m_selectAnchor.column() > 0) {
                         if (m_selectAnchor.line() + 1 >= doc()->lines()) {
                             m_selectAnchor.setColumn(doc()->line(newCursor.line()).length());
                         } else {
                             m_selectAnchor.setPosition(m_selectAnchor.line() + 1, 0);
                         }
                     }
                 } else { // same line, ignore
                     doSelect = false;
                 }
                 break;
             case Mouse: {
                 if (!m_selectionCached.isValid()) {
                     break;
                 }
 
                 if (newCursor > m_selectionCached.end()) {
                     m_selectAnchor = m_selectionCached.start();
                 } else if (newCursor < m_selectionCached.start()) {
                     m_selectAnchor = m_selectionCached.end();
                 } else {
                     doSelect = false;
                 }
             } break;
             default: /* nothing special to do */;
             }
 
             if (doSelect) {
                 setSelection(KTextEditor::Range(m_selectAnchor, newCursor));
             } else if (m_selectionCached.isValid()) { // we have a cached selection, so we restore that
                 setSelection(m_selectionCached);
             }
         }
 
         m_selChangedByUser = true;
     } else if (!view()->config()->persistentSelection()) {
         view()->clearSelection();
 
         m_selectionCached = KTextEditor::Range::invalid();
         m_selectAnchor = KTextEditor::Cursor::invalid();
     }
 
 #ifndef QT_NO_ACCESSIBILITY
 //    FIXME KF5
 //    QAccessibleTextSelectionEvent ev(this, /* selection start, selection end*/);
 //    QAccessible::updateAccessibility(&ev);
 #endif
 }
 
 void KateViewInternal::setSelection(KTextEditor::Range range)
 {
     disconnect(m_view, &KTextEditor::ViewPrivate::selectionChanged, this, &KateViewInternal::viewSelectionChanged);
     view()->setSelection(range);
     connect(m_view, &KTextEditor::ViewPrivate::selectionChanged, this, &KateViewInternal::viewSelectionChanged);
 }
 
 void KateViewInternal::moveCursorToSelectionEdge(bool scroll)
 {
     if (!view()->selection()) {
         return;
     }
 
     int tmp = m_minLinesVisible;
     m_minLinesVisible = 0;
 
     if (view()->selectionRange().start() < m_selectAnchor) {
         updateCursor(view()->selectionRange().start(), false, false, false, scroll);
     } else {
         updateCursor(view()->selectionRange().end(), false, false, false, scroll);
     }
     if (!scroll) {
         m_madeVisible = false;
     }
 
     m_minLinesVisible = tmp;
 }
 
 KTextEditor::Range KateViewInternal::findMatchingFoldingMarker(const KTextEditor::Cursor currentCursorPos, const int value, const int maxLines)
 {
     const int direction = !(value < 0) ? 1 : -1;
     int foldCounter = 0;
     int lineCounter = 0;
     auto &foldMarkers = m_view->doc()->buffer().plainLine(currentCursorPos.line())->foldings();
 
     // searching a end folding marker? go left to right
     // otherwise, go right to left
     long i = direction == 1 ? 0 : (long)foldMarkers.size() - 1;
 
     // For the first line, we start considering the first folding after the cursor
     for (; i >= 0 && i < (long)foldMarkers.size(); i += direction) {
         if ((foldMarkers[i].offset - currentCursorPos.column()) * direction > 0) {
             if (foldMarkers[i].foldingValue == value) {
                 foldCounter += 1;
             } else if (foldMarkers[i].foldingValue == -value && foldCounter > 0) {
                 foldCounter -= 1;
             } else if (foldMarkers[i].foldingValue == -value && foldCounter == 0) {
                 return KTextEditor::Range(currentCursorPos.line(),
                                           getStartOffset(direction, foldMarkers[i].offset, foldMarkers[i].length),
                                           currentCursorPos.line(),
                                           getEndOffset(direction, foldMarkers[i].offset, foldMarkers[i].length));
             }
         }
     }
 
     // for the other lines
     int currentLine = currentCursorPos.line() + direction;
     for (; currentLine >= 0 && currentLine < m_view->doc()->lines() && lineCounter < maxLines; currentLine += direction) {
         // update line attributes
         auto &foldMarkers = m_view->doc()->buffer().plainLine(currentLine)->foldings();
         i = direction == 1 ? 0 : (long)foldMarkers.size() - 1;
 
         // iterate through the markers
         for (; i >= 0 && i < (long)foldMarkers.size(); i += direction) {
             if (foldMarkers[i].foldingValue == value) {
                 foldCounter += 1;
             } else if (foldMarkers[i].foldingValue == -value && foldCounter != 0) {
                 foldCounter -= 1;
             } else if (foldMarkers[i].foldingValue == -value && foldCounter == 0) {
                 return KTextEditor::Range(currentLine,
                                           getStartOffset(direction, foldMarkers[i].offset, foldMarkers[i].length),
                                           currentLine,
                                           getEndOffset(direction, foldMarkers[i].offset, foldMarkers[i].length));
             }
         }
         lineCounter += 1;
     }
 
     // got out of loop, no matching folding found
     // returns a invalid folding range
     return KTextEditor::Range::invalid();
 }
 
 void KateViewInternal::updateFoldingMarkersHighlighting()
 {
     auto &foldings = m_view->doc()->buffer().plainLine(m_cursor.line())->foldings();
 
     for (unsigned long i = 0; i < foldings.size(); i++) {
         // 1 -> left to right, the current folding is start type
         // -1 -> right to left, the current folding is end type
         int direction = !(foldings[i].foldingValue < 0) ? 1 : -1;
 
         int startOffset = getStartOffset(-direction, foldings[i].offset, foldings[i].length);
         int endOffset = getEndOffset(-direction, foldings[i].offset, foldings[i].length);
 
         if (m_cursor.column() >= startOffset && m_cursor.column() <= endOffset) {
             const auto foldingMarkerMatch = findMatchingFoldingMarker(KTextEditor::Cursor(m_cursor.line(), m_cursor.column()), foldings[i].foldingValue, 2000);
 
             if (!foldingMarkerMatch.isValid()) {
                 break;
             }
 
             // set fmStart to Opening Folding Marker and fmEnd to Ending Folding Marker
             if (direction == 1) {
                 m_fmStart->setRange(KTextEditor::Range(m_cursor.line(), startOffset, m_cursor.line(), endOffset));
                 m_fmEnd->setRange(foldingMarkerMatch);
             } else {
                 m_fmStart->setRange(foldingMarkerMatch);
                 m_fmEnd->setRange(KTextEditor::Range(m_cursor.line(), startOffset, m_cursor.line(), endOffset));
             }
 
             KTextEditor::Attribute::Ptr fill = KTextEditor::Attribute::Ptr(new KTextEditor::Attribute());
             fill->setBackground(view()->m_renderer->config()->highlightedBracketColor());
 
             m_fmStart->setAttribute(fill);
             m_fmEnd->setAttribute(fill);
             return;
         }
     }
     m_fmStart->setRange(KTextEditor::Range::invalid());
     m_fmEnd->setRange(KTextEditor::Range::invalid());
 }
 
 void KateViewInternal::updateSecondaryCursors(const QVarLengthArray<CursorPair, 16> &cursors, bool sel)
 {
     if (sel) {
         for (int i = 0; i < cursors.size(); ++i) {
             updateSecondarySelection(i, cursors[i].oldPos, cursors[i].newPos);
         }
         if (!cursors.isEmpty()) {
             mergeSelections();
         }
     } else {
         view()->clearSecondarySelections();
     }
 
     QVarLengthArray<int> linesToUpdate;
     for (auto cpair : cursors) {
         linesToUpdate.push_back(cpair.oldPos.line());
         linesToUpdate.push_back(cpair.newPos.line());
     }
     // Remove duplicate stuff
     std::sort(linesToUpdate.begin(), linesToUpdate.end());
     auto it = std::unique(linesToUpdate.begin(), linesToUpdate.end());
 
     // Collapse ranges to avoid extra work
     using Range = std::pair<int, int>; // start, length
     QVarLengthArray<Range> ranges;
     int prev = 0;
     for (auto i = linesToUpdate.begin(); i != it; ++i) {
         int curLine = *i;
         if (!ranges.isEmpty() && prev + 1 == curLine) {
             ranges.back().second++;
         } else {
             ranges.push_back({curLine, 0});
         }
         prev = curLine;
     }
 
     for (auto range : ranges) {
         int startLine = range.first;
         int endLine = range.first + range.second;
         tagLines(startLine, endLine, /*realLines=*/true);
     }
     updateDirty();
 }
 
 void KateViewInternal::mergeSelections()
 {
     using SecondaryCursor = KTextEditor::ViewPrivate::SecondaryCursor;
     using Range = KTextEditor::Range;
     auto doMerge = [](Range newRange, SecondaryCursor &a, SecondaryCursor &b) {
         a.range->setRange(newRange);
 
         b.pos.reset();
         b.range.reset();
     };
 
     auto &cursors = view()->m_secondaryCursors;
     for (auto it = cursors.begin(); it != cursors.end(); ++it) {
         if (!it->range)
             continue;
         if (it + 1 == cursors.end()) {
             break;
         }
 
         auto n = std::next(it);
         if (/*!it->range || */ !n->range) {
             continue;
         }
 
         auto curRange = it->range->toRange();
         auto nextRange = n->range->toRange();
         if (!curRange.overlaps(nextRange)) {
             continue;
         }
 
         bool isLefSel = it->cursor() < it->anchor;
 
         // if the ranges overlap we expand the next range
         // to include the current one. This allows us to
         // check all ranges for overlap in one go
         auto curPos = it->cursor();
         nextRange.expandToRange(curRange);
         if (isLefSel) {
             // in left selection our next cursor
             // is ahead somewhere, we want to keep
             // the smallest position
             n->pos->setPosition(curPos);
             n->anchor = qMax(n->anchor, it->anchor);
         } else {
             n->anchor = qMin(n->anchor, it->anchor);
         }
         doMerge(nextRange, *n, *it);
     }
 
     if (view()->selection()) {
         auto primarySel = view()->m_selection.toRange();
         auto primCursor = cursorPosition();
         for (auto it = cursors.begin(); it != cursors.end(); ++it) {
             // If range is valid, we merge selection into primary
             // Otherwise if cursor is inside primary selection, it
             // is removed
             auto curRange = it->range ? it->range->toRange() : Range::invalid();
             if (curRange.isValid() && primarySel.overlaps(curRange)) {
                 primarySel.expandToRange(curRange);
                 bool isLeft = it->cursor() < it->anchor;
 
                 if (isLeft) {
                     if (it->cursor() < primCursor) {
                         updateCursor(it->cursor());
                     }
                     m_selectAnchor = qMax(m_selectAnchor, it->anchor);
                 } else {
                     if (it->cursor() > primCursor) {
                         updateCursor(it->cursor());
                     }
                     m_selectAnchor = qMin(m_selectAnchor, it->anchor);
                 }
 
                 setSelection(primarySel);
                 it->pos.reset();
                 it->range.reset();
             } else if (it->pos) {
                 // This only needs to be done for primary selection
                 // because remember, mouse selection is always with
                 // primary cursor
                 auto pos = it->cursor();
                 if (!primarySel.boundaryAtCursor(pos) && primarySel.contains(pos)) {
                     it->pos.reset();
                 }
             }
         }
     }
 
     cursors.erase(std::remove_if(cursors.begin(),
                                  cursors.end(),
                                  [](const SecondaryCursor &c) {
                                      return !c.pos.get();
                                  }),
                   cursors.end());
 }
 
 void KateViewInternal::updateCursor(const KTextEditor::Cursor newCursor, bool force, bool center, bool calledExternally, bool scroll)
 {
     if (!force && (m_cursor.toCursor() == newCursor)) {
         m_displayCursor = toVirtualCursor(newCursor);
         if (scroll && !m_madeVisible && m_view == doc()->activeView()) {
             // unfold if required
             view()->textFolding().ensureLineIsVisible(newCursor.line());
 
             makeVisible(m_displayCursor, m_displayCursor.column(), false, center, calledExternally);
         }
 
         return;
     }
 
     if (m_cursor.line() != newCursor.line()) {
         m_leftBorder->updateForCursorLineChange();
     }
 
     // unfold if required
     view()->textFolding().ensureLineIsVisible(newCursor.line());
 
     KTextEditor::Cursor oldDisplayCursor = m_displayCursor;
 
     m_displayCursor = toVirtualCursor(newCursor);
     m_cursor.setPosition(newCursor);
 
     if (m_view == doc()->activeView() && scroll) {
         makeVisible(m_displayCursor, m_displayCursor.column(), false, center, calledExternally);
     }
 
     updateBracketMarks();
 
     updateFoldingMarkersHighlighting();
 
     // avoid double work, tagLine => tagLines => not that cheap, much more costly than to compare 2 ints
     tagLine(oldDisplayCursor);
     if (oldDisplayCursor.line() != m_displayCursor.line()) {
         tagLine(m_displayCursor);
     }
 
     updateMicroFocus();
 
     if (m_cursorTimer.isActive()) {
         if (QApplication::cursorFlashTime() > 0) {
             m_cursorTimer.start(QApplication::cursorFlashTime() / 2);
         }
         renderer()->setDrawCaret(true);
     }
 
     // Remember the maximum X position if requested
     if (m_preserveX) {
         m_preserveX = false;
     } else {
         m_preservedX = renderer()->cursorToX(cache()->textLayout(m_cursor), m_cursor, !view()->wrapCursor());
     }
 
     // qCDebug(LOG_KTE) << "m_preservedX: " << m_preservedX << " (was "<< oldmaxx << "), m_cursorX: " << m_cursorX;
     // qCDebug(LOG_KTE) << "Cursor now located at real " << cursor.line << "," << cursor.col << ", virtual " << m_displayCursor.line << ", " <<
     // m_displayCursor.col << "; Top is " << startLine() << ", " << startPos().col;
 
     cursorMoved();
 
     updateDirty(); // paintText(0, 0, width(), height(), true);
 
     Q_EMIT view()->cursorPositionChanged(m_view, m_cursor);
 }
 
 void KateViewInternal::updateBracketMarkAttributes()
 {
     KTextEditor::Attribute::Ptr bracketFill = KTextEditor::Attribute::Ptr(new KTextEditor::Attribute());
     bracketFill->setBackground(view()->m_renderer->config()->highlightedBracketColor());
     bracketFill->setBackgroundFillWhitespace(false);
     if (QFontInfo(renderer()->currentFont()).fixedPitch()) {
         // make font bold only for fixed fonts, otherwise text jumps around
         bracketFill->setFontBold();
     }
 
     m_bmStart->setAttribute(bracketFill);
     m_bmEnd->setAttribute(bracketFill);
 
     if (view()->m_renderer->config()->showWholeBracketExpression()) {
         KTextEditor::Attribute::Ptr expressionFill = KTextEditor::Attribute::Ptr(new KTextEditor::Attribute());
         expressionFill->setBackground(view()->m_renderer->config()->highlightedBracketColor());
         expressionFill->setBackgroundFillWhitespace(false);
 
         m_bm->setAttribute(expressionFill);
     } else {
         m_bm->setAttribute(KTextEditor::Attribute::Ptr(new KTextEditor::Attribute()));
     }
 }
 
 void KateViewInternal::updateBracketMarks()
 {
     // add some limit to this, this is really endless on big files without limit
     const int maxLines = 5000;
     const KTextEditor::Range newRange = doc()->findMatchingBracket(m_cursor, maxLines);
 
     // new range valid, then set ranges to it
     if (newRange.isValid()) {
         if (m_bm->toRange() == newRange) {
             // hide preview as it now (probably) blocks the top of the view
             hideBracketMatchPreview();
             return;
         }
 
         // modify full range
         m_bm->setRange(newRange);
 
         // modify start and end ranges
         m_bmStart->setRange(KTextEditor::Range(m_bm->start(), KTextEditor::Cursor(m_bm->start().line(), m_bm->start().column() + 1)));
         m_bmEnd->setRange(KTextEditor::Range(m_bm->end(), KTextEditor::Cursor(m_bm->end().line(), m_bm->end().column() + 1)));
 
         // show preview of the matching bracket's line
         if (m_view->config()->value(KateViewConfig::ShowBracketMatchPreview).toBool()) {
             showBracketMatchPreview();
         }
 
         // flash matching bracket
         if (!renderer()->config()->animateBracketMatching()) {
             return;
         }
 
         const KTextEditor::Cursor flashPos = (m_cursor == m_bmStart->start() || m_cursor == m_bmStart->end()) ? m_bmEnd->start() : m_bm->start();
         if (flashPos != m_bmLastFlashPos->toCursor()) {
             m_bmLastFlashPos->setPosition(flashPos);
 
             KTextEditor::Attribute::Ptr attribute = attributeAt(flashPos);
             attribute->setBackground(view()->m_renderer->config()->highlightedBracketColor());
             if (m_bmStart->attribute()->fontBold()) {
                 attribute->setFontBold(true);
             }
 
             flashChar(flashPos, attribute);
         }
         return;
     }
 
     // new range was invalid
     m_bm->setRange(KTextEditor::Range::invalid());
     m_bmStart->setRange(KTextEditor::Range::invalid());
     m_bmEnd->setRange(KTextEditor::Range::invalid());
     m_bmLastFlashPos->setPosition(KTextEditor::Cursor::invalid());
     hideBracketMatchPreview();
 }
 
 bool KateViewInternal::tagLine(const KTextEditor::Cursor virtualCursor)
 {
     // we had here some special case handling for one line, it was just randomly wrong for dyn. word wrapped stuff => use the generic function
     return tagLines(virtualCursor, virtualCursor, false);
 }
 
 bool KateViewInternal::tagLines(int start, int end, bool realLines)
 {
     return tagLines(KTextEditor::Cursor(start, 0), KTextEditor::Cursor(end, -1), realLines);
 }
 
 bool KateViewInternal::tagLines(KTextEditor::Cursor start, KTextEditor::Cursor end, bool realCursors)
 {
     if (realCursors) {
         cache()->relayoutLines(start.line(), end.line());
 
         // qCDebug(LOG_KTE)<<"realLines is true";
         start = toVirtualCursor(start);
         end = toVirtualCursor(end);
 
     } else {
         cache()->relayoutLines(toRealCursor(start).line(), toRealCursor(end).line());
     }
 
     if (end.line() < startLine()) {
         // qCDebug(LOG_KTE)<<"end<startLine";
         return false;
     }
     // Used to be > endLine(), but cache may not be valid when checking, so use a
     // less optimal but still adequate approximation (potential overestimation but minimal performance difference)
     if (start.line() > startLine() + cache()->viewCacheLineCount()) {
         // qCDebug(LOG_KTE)<<"start> endLine"<<start<<" "<<(endLine());
         return false;
     }
 
     cache()->updateViewCache(startPos());
 
     // qCDebug(LOG_KTE) << "tagLines( [" << start << "], [" << end << "] )";
 
     bool ret = false;
 
     for (int z = 0; z < cache()->viewCacheLineCount(); z++) {
         KateTextLayout &line = cache()->viewLine(z);
         if ((line.virtualLine() > start.line() || (line.virtualLine() == start.line() && line.endCol() >= start.column() && start.column() != -1))
             && (line.virtualLine() < end.line() || (line.virtualLine() == end.line() && (line.startCol() <= end.column() || end.column() == -1)))) {
             ret = true;
             break;
             // qCDebug(LOG_KTE) << "Tagged line " << line.line();
         }
     }
 
     // full update of border it we have indentation based hl and show the markers always
     if (!m_view->config()->showFoldingOnHoverOnly() && doc()->highlight() && doc()->highlight()->foldingIndentationSensitive()) {
         // not the default setting, can be optimized if ever some issue
         m_leftBorder->update();
     } else if (!view()->dynWordWrap()) {
         int y = lineToY(start.line());
         // FIXME is this enough for when multiple lines are deleted
         int h = (end.line() - start.line() + 2) * renderer()->lineHeight();
         if (end.line() >= view()->textFolding().visibleLines() - 1) {
             h = height();
         }
 
         m_leftBorder->update(0, y, m_leftBorder->width(), h);
     } else {
         // FIXME Do we get enough good info in editRemoveText to optimize this more?
         // bool justTagged = false;
         for (int z = 0; z < cache()->viewCacheLineCount(); z++) {
             KateTextLayout &line = cache()->viewLine(z);
             if (!line.isValid()
                 || ((line.virtualLine() > start.line() || (line.virtualLine() == start.line() && line.endCol() >= start.column() && start.column() != -1))
                     && (line.virtualLine() < end.line() || (line.virtualLine() == end.line() && (line.startCol() <= end.column() || end.column() == -1))))) {
                 // justTagged = true;
                 m_leftBorder->update(0, z * renderer()->lineHeight(), m_leftBorder->width(), m_leftBorder->height());
                 break;
             }
             /*else if (justTagged)
             {
               justTagged = false;
               leftBorder->update (0, z * doc()->viewFont.fontHeight, leftBorder->width(), doc()->viewFont.fontHeight);
               break;
             }*/
         }
     }
 
     return ret;
 }
 
 bool KateViewInternal::tagRange(KTextEditor::Range range, bool realCursors)
 {
     return tagLines(range.start(), range.end(), realCursors);
 }
 
 void KateViewInternal::tagAll()
 {
     // clear the cache...
     cache()->clear();
 
     m_leftBorder->updateFont();
     m_leftBorder->update();
 }
 
 void KateViewInternal::paintCursor()
 {
     if (tagLine(m_displayCursor)) {
         updateDirty(); // paintText (0,0,width(), height(), true);
     }
 
     const int s = view()->firstDisplayedLine();
     const int e = view()->lastDisplayedLine();
     for (const auto &c : view()->m_secondaryCursors) {
         auto p = c.cursor();
         if (p.line() >= s - 1 && p.line() <= e + 1) {
             tagLines(p, p, true);
         }
     }
 
     updateDirty(); // paintText (0,0,width(), height(), true);
 }
 
 KTextEditor::Cursor KateViewInternal::cursorForPoint(QPoint p)
 {
     KateTextLayout thisLine = yToKateTextLayout(p.y());
     KTextEditor::Cursor c;
 
     if (!thisLine.isValid()) { // probably user clicked below the last line -> use the last line
         thisLine = cache()->textLayout(doc()->lines() - 1, -1);
     }
 
     c = renderer()->xToCursor(thisLine, startX() + p.x(), !view()->wrapCursor());
 
     if (c.line() < 0 || c.line() >= doc()->lines()) {
         return KTextEditor::Cursor::invalid();
     }
 
     // loop over all notes and check if the point is inside it
     const auto inlineNotes = view()->inlineNotes(c.line());
     p = mapToGlobal(p);
     for (const auto &note : inlineNotes) {
         auto noteCursor = note.m_position;
         // we are not interested in notes that are past the end or at 0
         if (note.m_position.column() >= doc()->lineLength(c.line()) || note.m_position.column() == 0) {
             continue;
         }
         // an inline note is "part" of a char i.e., char width is increased so that
         // an inline note can be painted beside it. So we need to find the actual
         // char width
         const auto caretWidth = renderer()->caretStyle() == KateRenderer::Line ? 2. : 0.;
         const auto width = KTextEditor::InlineNote(note).width() + caretWidth;
         const auto charWidth = renderer()->currentFontMetrics().horizontalAdvance(doc()->characterAt(noteCursor));
         const auto halfCharWidth = (charWidth / 2);
         // we leave the first half of the char width. If the user has clicked in the first half, let it go the
         // previous column.
         const auto totalWidth = width + halfCharWidth;
         auto start = mapToGlobal(cursorToCoordinate(noteCursor, true, false));
         start = start - QPoint(totalWidth, 0);
         QRect r(start, QSize{(int)halfCharWidth, renderer()->lineHeight()});
         if (r.contains(p)) {
             c = noteCursor;
             break;
         }
     }
 
     return c;
 }
 
 // Point in content coordinates
 void KateViewInternal::placeCursor(const QPoint &p, bool keepSelection, bool updateSelection)
 {
     KTextEditor::Cursor c = cursorForPoint(p);
     if (!c.isValid()) {
         return;
     }
 
     if (updateSelection) {
         KateViewInternal::updateSelection(c, keepSelection);
     }
 
     int tmp = m_minLinesVisible;
     m_minLinesVisible = 0;
     updateCursor(c);
     m_minLinesVisible = tmp;
 
     if (updateSelection && keepSelection) {
         moveCursorToSelectionEdge();
     }
 }
 
 // Point in content coordinates
 bool KateViewInternal::isTargetSelected(const QPoint &p)
 {
     const KateTextLayout &thisLine = yToKateTextLayout(p.y());
     if (!thisLine.isValid()) {
         return false;
     }
 
     return view()->cursorSelected(renderer()->xToCursor(thisLine, startX() + p.x(), !view()->wrapCursor()));
 }
 
 // BEGIN EVENT HANDLING STUFF
 
 bool KateViewInternal::eventFilter(QObject *obj, QEvent *e)
 {
     switch (e->type()) {
     case QEvent::ChildAdded:
     case QEvent::ChildRemoved: {
         QChildEvent *c = static_cast<QChildEvent *>(e);
         if (c->added()) {
             c->child()->installEventFilter(this);
 
         } else if (c->removed()) {
             c->child()->removeEventFilter(this);
         }
     } break;
 
     case QEvent::ShortcutOverride: {
         QKeyEvent *k = static_cast<QKeyEvent *>(e);
 
         if (k->key() == Qt::Key_Escape && k->modifiers() == Qt::NoModifier) {
             if (!view()->m_secondaryCursors.empty()) {
                 view()->clearSecondaryCursors();
                 k->accept();
                 return true;
             }
 
             if (view()->isCompletionActive()) {
                 view()->abortCompletion();
                 k->accept();
                 // qCDebug(LOG_KTE) << obj << "shortcut override" << k->key() << "aborting completion";
                 return true;
             } else if (view()->bottomViewBar()->barWidgetVisible()) {
                 view()->bottomViewBar()->hideCurrentBarWidget();
                 k->accept();
                 // qCDebug(LOG_KTE) << obj << "shortcut override" << k->key() << "closing view bar";
                 return true;
             } else if (!view()->config()->persistentSelection() && view()->selection()) {
                 m_currentInputMode->clearSelection();
                 k->accept();
                 // qCDebug(LOG_KTE) << obj << "shortcut override" << k->key() << "clearing selection";
                 return true;
             }
         }
 
         if (m_currentInputMode->stealKey(k)) {
             k->accept();
             return true;
         }
 
         // CompletionReplayer.replay only gets called when a Ctrl-Space gets to InsertViMode::handleKeyPress
         // Workaround for BUG: 334032 (https://bugs.kde.org/show_bug.cgi?id=334032)
         if (k->key() == Qt::Key_Space && k->modifiers() == Qt::ControlModifier) {
             keyPressEvent(k);
             if (k->isAccepted()) {
                 return true;
             }
         }
     } break;
 
     case QEvent::KeyPress: {
         QKeyEvent *k = static_cast<QKeyEvent *>(e);
 
         // Override all other single key shortcuts which do not use a modifier other than Shift
         if (obj == this && (!k->modifiers() || k->modifiers() == Qt::ShiftModifier)) {
             keyPressEvent(k);
             if (k->isAccepted()) {
                 // qCDebug(LOG_KTE) << obj << "shortcut override" << k->key() << "using keystroke";
                 return true;
             }
         }
 
         // qCDebug(LOG_KTE) << obj << "shortcut override" << k->key() << "ignoring";
     } break;
 
     case QEvent::DragMove: {
         QPoint currentPoint = ((QDragMoveEvent *)e)->pos();
 
         QRect doNotScrollRegion(s_scrollMargin, s_scrollMargin, width() - s_scrollMargin * 2, height() - s_scrollMargin * 2);
 
         if (!doNotScrollRegion.contains(currentPoint)) {
             startDragScroll();
             // Keep sending move events
             ((QDragMoveEvent *)e)->accept(QRect(0, 0, 0, 0));
         }
 
         dragMoveEvent((QDragMoveEvent *)e);
     } break;
 
     case QEvent::DragLeave:
         // happens only when pressing ESC while dragging
         stopDragScroll();
         break;
 
     case QEvent::WindowDeactivate:
         hideBracketMatchPreview();
         break;
 
     case QEvent::ScrollPrepare: {
         QScrollPrepareEvent *s = static_cast<QScrollPrepareEvent *>(e);
         scrollPrepareEvent(s);
     } return true;
 
     case QEvent::Scroll: {
         QScrollEvent *s = static_cast<QScrollEvent *>(e);
         scrollEvent(s);
     } return true;
 
     default:
         break;
     }
 
     return QWidget::eventFilter(obj, e);
 }
 
 void KateViewInternal::keyPressEvent(QKeyEvent *e)
 {
     m_shiftKeyPressed = e->modifiers() & Qt::ShiftModifier;
     if (e->key() == Qt::Key_Left && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateLeft();
         e->setAccepted(true);
         return;
     }
     if (e->key() == Qt::Key_Right && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateRight();
         e->setAccepted(true);
         return;
     }
     if (e->key() == Qt::Key_Up && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateUp();
         e->setAccepted(true);
         return;
     }
     if (e->key() == Qt::Key_Down && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateDown();
         e->setAccepted(true);
         return;
     }
     if (e->key() == Qt::Key_Return && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateAccept();
         e->setAccepted(true);
         return;
     }
     if (e->key() == Qt::Key_Backspace && e->modifiers() == Qt::AltModifier) {
         view()->emitNavigateBack();
         e->setAccepted(true);
         return;
     }
 
     if (e->key() == Qt::Key_Alt && view()->completionWidget()->isCompletionActive()) {
         view()->completionWidget()->toggleDocumentation();
     }
 
     // Note: AND'ing with <Shift> is a quick hack to fix Key_Enter
     const int key = e->key() | (e->modifiers() & Qt::ShiftModifier);
 
     if (m_currentInputMode->keyPress(e)) {
         return;
     }
 
     if (!doc()->isReadWrite()) {
         e->ignore();
         return;
     }
 
     if ((key == Qt::Key_Return) || (key == Qt::Key_Enter) || (key == Qt::SHIFT + Qt::Key_Return) || (key == Qt::SHIFT + Qt::Key_Enter)) {
         view()->keyReturn();
         e->accept();
         return;
     }
 
     if (key == Qt::Key_Backspace || key == Qt::SHIFT + Qt::Key_Backspace) {
         // view()->backspace();
         e->accept();
 
         return;
     }
 
     if (key == Qt::Key_Tab || key == Qt::SHIFT + Qt::Key_Backtab || key == Qt::Key_Backtab) {
         if (key == Qt::Key_Tab) {
             uint tabHandling = doc()->config()->tabHandling();
             // convert tabSmart into tabInsertsTab or tabIndents:
             if (tabHandling == KateDocumentConfig::tabSmart) {
                 // multiple lines selected
                 if (view()->selection() && !view()->selectionRange().onSingleLine()) {
                     tabHandling = KateDocumentConfig::tabIndents;
                 }
 
                 // otherwise: take look at cursor position
                 else {
                     // if the cursor is at or before the first non-space character
                     // or on an empty line,
                     // Tab indents, otherwise it inserts a tab character.
                     Kate::TextLine line = doc()->kateTextLine(m_cursor.line());
                     int first = line->firstChar();
                     if (first < 0 || m_cursor.column() <= first) {
                         tabHandling = KateDocumentConfig::tabIndents;
                     } else {
                         tabHandling = KateDocumentConfig::tabInsertsTab;
                     }
                 }
             }
 
             // either we just insert a tab or we convert that into an indent action
             if (tabHandling == KateDocumentConfig::tabInsertsTab) {
                 doc()->typeChars(m_view, QStringLiteral("\t"));
             } else {
                 doc()->editBegin();
                 for (const auto &c : std::as_const(m_view->m_secondaryCursors)) {
                     auto cursor = c.cursor();
                     doc()->indent(KTextEditor::Range(cursor.line(), 0, cursor.line(), 0), 1);
                 }
 
                 doc()->indent(view()->selection() ? view()->selectionRange() : KTextEditor::Range(m_cursor.line(), 0, m_cursor.line(), 0), 1);
                 doc()->editEnd();
             }
 
             e->accept();
 
             return;
         } else if (doc()->config()->tabHandling() != KateDocumentConfig::tabInsertsTab) {
             // key == Qt::SHIFT+Qt::Key_Backtab || key == Qt::Key_Backtab
             doc()->indent(view()->selection() ? view()->selectionRange() : KTextEditor::Range(m_cursor.line(), 0, m_cursor.line(), 0), -1);
             e->accept();
 
             return;
         }
     }
 
     if (isAcceptableInput(e)) {
         doc()->typeChars(m_view, e->text());
         e->accept();
         return;
     }
 
     e->ignore();
 }
 
 void KateViewInternal::keyReleaseEvent(QKeyEvent *e)
 {
     if (m_shiftKeyPressed && (e->modifiers() & Qt::ShiftModifier) == 0) {
         m_shiftKeyPressed = false;
 
         if (m_selChangedByUser) {
             if (view()->selection()) {
                 QApplication::clipboard()->setText(view()->selectionText(), QClipboard::Selection);
             }
 
             m_selChangedByUser = false;
         }
     }
 
     e->ignore();
     return;
 }
 
 bool KateViewInternal::isAcceptableInput(const QKeyEvent *e)
 {
     // reimplemented from QInputControl::isAcceptableInput()
 
     const QString text = e->text();
     if (text.isEmpty()) {
         return false;
     }
 
     const QChar c = text.at(0);
 
     // Formatting characters such as ZWNJ, ZWJ, RLM, etc. This needs to go before the
     // next test, since CTRL+SHIFT is sometimes used to input it on Windows.
     // see bug 389796 (typing formatting characters such as ZWNJ)
     // and bug 396764 (typing soft-hyphens)
     if (c.category() == QChar::Other_Format) {
         return true;
     }
 
     // QTBUG-35734: ignore Ctrl/Ctrl+Shift; accept only AltGr (Alt+Ctrl) on German keyboards
     if ((e->modifiers() == Qt::ControlModifier) || (e->modifiers() == (Qt::ShiftModifier | Qt::ControlModifier))) {
         return false;
     }
 
     // printable or private use is good, see e.g. bug 366424 (typing "private use" unicode characters)
     return c.isPrint() || (c.category() == QChar::Other_PrivateUse);
 }
 
 void KateViewInternal::contextMenuEvent(QContextMenuEvent *e)
 {
     // calculate where to show the context menu
 
     QPoint p = e->pos();
 
     if (e->reason() == QContextMenuEvent::Keyboard) {
         makeVisible(m_displayCursor, 0);
         p = cursorCoordinates(false);
         p.rx() -= startX();
     } else if (!view()->selection() || view()->config()->persistentSelection()) {
         placeCursor(e->pos());
     }
 
     // show it
     QMenu *cm = view()->contextMenu();
     if (cm) {
         view()->spellingMenu()->prepareToBeShown(cm);
         cm->popup(mapToGlobal(p));
         e->accept();
     }
 }
 
 void KateViewInternal::mousePressEvent(QMouseEvent *e)
 {
     if (sendMouseEventToInputContext(e)) {
         return;
     }
 
     // was an inline note clicked?
     const auto noteData = inlineNoteAt(e->globalPos());
     const KTextEditor::InlineNote note(noteData);
     if (note.position().isValid()) {
         note.provider()->inlineNoteActivated(noteData, e->button(), e->globalPos());
         return;
     }
 
     commitPreedit();
 
     // no -- continue with normal handling
     switch (e->button()) {
     case Qt::LeftButton:
 
         m_selChangedByUser = false;
 
         if (!view()->isMulticursorNotAllowed() && e->modifiers() == view()->config()->multiCursorModifiers()) {
             auto pos = cursorForPoint(e->pos());
             if (pos.isValid()) {
                 view()->addSecondaryCursor(pos);
                 e->accept();
                 return;
             }
         } else {
             view()->clearSecondaryCursors();
         }
 
         if (m_possibleTripleClick) {
             m_possibleTripleClick = false;
 
             m_selectionMode = Line;
 
             if (e->modifiers() & Qt::ShiftModifier) {
                 updateSelection(m_cursor, true);
             } else {
                 view()->selectLine(m_cursor);
                 if (view()->selection()) {
                     m_selectAnchor = view()->selectionRange().start();
                 }
             }
 
             if (view()->selection()) {
                 QApplication::clipboard()->setText(view()->selectionText(), QClipboard::Selection);
             }
 
             // Keep the line at the select anchor selected during further
             // mouse selection
             if (m_selectAnchor.line() > view()->selectionRange().start().line()) {
                 // Preserve the last selected line
                 if (m_selectAnchor == view()->selectionRange().end() && m_selectAnchor.column() == 0) {
                     m_selectionCached.setStart(KTextEditor::Cursor(m_selectAnchor.line() - 1, 0));
                 } else {
                     m_selectionCached.setStart(KTextEditor::Cursor(m_selectAnchor.line(), 0));
                 }
                 m_selectionCached.setEnd(view()->selectionRange().end());
             } else {
                 // Preserve the first selected line
                 m_selectionCached.setStart(view()->selectionRange().start());
                 if (view()->selectionRange().end().line() > view()->selectionRange().start().line()) {
                     m_selectionCached.setEnd(KTextEditor::Cursor(view()->selectionRange().start().line() + 1, 0));
                 } else {
                     m_selectionCached.setEnd(view()->selectionRange().end());
                 }
             }
 
             moveCursorToSelectionEdge();
 
             m_scrollX = 0;
             m_scrollY = 0;
             m_scrollTimer.start(50);
 
             e->accept();
             return;
         } else if (m_selectionMode == Default) {
             m_selectionMode = Mouse;
         }
 
         // request the software keyboard, if any
         if (e->button() == Qt::LeftButton && qApp->autoSipEnabled()) {
             QStyle::RequestSoftwareInputPanel behavior = QStyle::RequestSoftwareInputPanel(style()->styleHint(QStyle::SH_RequestSoftwareInputPanel));
             if (hasFocus() || behavior == QStyle::RSIP_OnMouseClick) {
                 QEvent event(QEvent::RequestSoftwareInputPanel);
                 QApplication::sendEvent(this, &event);
             }
         }
 
         if (e->modifiers() & Qt::ShiftModifier) {
             if (!m_selectAnchor.isValid()) {
                 m_selectAnchor = m_cursor;
             }
         } else {
             m_selectionCached = KTextEditor::Range::invalid();
         }
 
         if (view()->config()->textDragAndDrop() && !(e->modifiers() & Qt::ShiftModifier) && isTargetSelected(e->pos())) {
             m_dragInfo.state = diPending;
             m_dragInfo.start = e->pos();
         } else {
             m_dragInfo.state = diNone;
 
             if (e->modifiers() & Qt::ShiftModifier) {
                 placeCursor(e->pos(), true, false);
                 if (m_selectionCached.start().isValid()) {
                     if (m_cursor.toCursor() < m_selectionCached.start()) {
                         m_selectAnchor = m_selectionCached.end();
                     } else {
                         m_selectAnchor = m_selectionCached.start();
                     }
                 }
 
                 // update selection and do potential clipboard update, see bug 443642
                 setSelection(KTextEditor::Range(m_selectAnchor, m_cursor));
                 if (view()->selection()) {
                     QApplication::clipboard()->setText(view()->selectionText(), QClipboard::Selection);
                 }
             } else {
                 placeCursor(e->pos());
             }
 
             m_scrollX = 0;
             m_scrollY = 0;
 
             m_scrollTimer.start(50);
         }
 
         e->accept();
         break;
 
     case Qt::RightButton:
         if (e->pos().x() == 0) {
             // Special handling for folding by right click
             placeCursor(e->pos());
             e->accept();
         }
         break;
 
     default:
         e->ignore();
         break;
     }
 }
 
 void KateViewInternal::mouseDoubleClickEvent(QMouseEvent *e)
 {
     if (sendMouseEventToInputContext(e)) {
         return;
     }
     if (e->button() == Qt::LeftButton) {
         m_selectionMode = Word;
 
         if (e->modifiers() & Qt::ShiftModifier) {
             // Now select the word under the select anchor
             int cs;
             int ce;
             Kate::TextLine l = doc()->kateTextLine(m_selectAnchor.line());
 
             ce = m_selectAnchor.column();
             if (ce > 0 && doc()->highlight()->isInWord(l->at(ce))) {
                 for (; ce < l->length(); ce++) {
                     if (!doc()->highlight()->isInWord(l->at(ce))) {
                         break;
                     }
                 }
             }
 
             cs = m_selectAnchor.column() - 1;
             if (cs < doc()->lineLength(m_selectAnchor.line()) && doc()->highlight()->isInWord(l->at(cs))) {
                 for (cs--; cs >= 0; cs--) {
                     if (!doc()->highlight()->isInWord(l->at(cs))) {
                         break;
                     }
                 }
             }
 
             // ...and keep it selected
             if (cs + 1 < ce) {
                 m_selectionCached.setStart(KTextEditor::Cursor(m_selectAnchor.line(), cs + 1));
                 m_selectionCached.setEnd(KTextEditor::Cursor(m_selectAnchor.line(), ce));
             } else {
                 m_selectionCached.setStart(m_selectAnchor);
                 m_selectionCached.setEnd(m_selectAnchor);
             }
             // Now word select to the mouse cursor
             placeCursor(e->pos(), true);
         } else {
             // first clear the selection, otherwise we run into bug #106402
             // ...and set the cursor position, for the same reason (otherwise there
             // are *other* idiosyncrasies we can't fix without reintroducing said
             // bug)
             // Parameters: don't redraw, and don't emit selectionChanged signal yet
             view()->clearSelection(false, false);
             placeCursor(e->pos());
             view()->selectWord(m_cursor);
             cursorToMatchingBracket(true);
 
             if (view()->selection()) {
                 m_selectAnchor = view()->selectionRange().start();
                 m_selectionCached = view()->selectionRange();
             } else {
                 m_selectAnchor = m_cursor;
                 m_selectionCached = KTextEditor::Range(m_cursor, m_cursor);
             }
         }
 
         // Move cursor to end (or beginning) of selected word
 #ifndef Q_OS_MACOS
         if (view()->selection()) {
             QApplication::clipboard()->setText(view()->selectionText(), QClipboard::Selection);
         }
 #endif
 
         moveCursorToSelectionEdge();
         m_possibleTripleClick = true;
         QTimer::singleShot(QApplication::doubleClickInterval(), this, SLOT(tripleClickTimeout()));
 
         m_scrollX = 0;
         m_scrollY = 0;
 
         m_scrollTimer.start(50);
 
         e->accept();
     } else {
         e->ignore();
     }
 }
 
 void KateViewInternal::tripleClickTimeout()
 {
     m_possibleTripleClick = false;
 }
 
 void KateViewInternal::beginSelectLine(const QPoint &pos)
 {
     placeCursor(pos);
     m_possibleTripleClick = true; // set so subsequent mousePressEvent will select line
 }
 
 void KateViewInternal::mouseReleaseEvent(QMouseEvent *e)
 {
     if (sendMouseEventToInputContext(e)) {
         return;
     }
 
     switch (e->button()) {
     case Qt::LeftButton:
         m_selectionMode = Default;
         //       m_selectionCached.start().setLine( -1 );
 
         if (m_selChangedByUser) {
             if (view()->selection()) {
                 QApplication::clipboard()->setText(view()->selectionText(), QClipboard::Selection);
             }
             moveCursorToSelectionEdge();
 
             m_selChangedByUser = false;
         }
 
         if (m_dragInfo.state == diPending) {
             placeCursor(e->pos(), e->modifiers() & Qt::ShiftModifier);
         } else if (m_dragInfo.state == diNone) {
             m_scrollTimer.stop();
         }
 
         m_dragInfo.state = diNone;
 
         // merge any overlapping selections/cursors
         if (view()->selection() && !view()->m_secondaryCursors.empty()) {
             mergeSelections();
         }
 
         e->accept();
         break;
 
     case Qt::MiddleButton:
         if (!view()->config()->mousePasteAtCursorPosition()) {
             placeCursor(e->pos());
         }
 
         if (doc()->isReadWrite()) {
             QString clipboard = QApplication::clipboard()->text(QClipboard::Selection);
             view()->paste(&clipboard);
         }
 
         e->accept();
         break;
 
     default:
         e->ignore();
         break;
     }
 }
 
 void KateViewInternal::leaveEvent(QEvent *)
 {
     m_textHintTimer.stop();
 
     // fix bug 194452, scrolling keeps going if you scroll via mouse drag and press and other mouse
     // button outside the view area
     if (m_dragInfo.state == diNone) {
         m_scrollTimer.stop();
     }
 
     hideBracketMatchPreview();
 }
 
 KTextEditor::Cursor KateViewInternal::coordinatesToCursor(const QPoint &_coord, bool includeBorder) const
 {
     QPoint coord(_coord);
 
     KTextEditor::Cursor ret = KTextEditor::Cursor::invalid();
 
     if (includeBorder) {
         coord.rx() -= m_leftBorder->width();
     }
     coord.rx() += startX();
 
     const KateTextLayout &thisLine = yToKateTextLayout(coord.y());
     if (thisLine.isValid()) {
         ret = renderer()->xToCursor(thisLine, coord.x(), !view()->wrapCursor());
     }
 
     if (ret.column() > view()->document()->lineLength(ret.line())) {
         // The cursor is beyond the end of the line; in that case the renderer
         // gives the index of the character behind the last one.
         return KTextEditor::Cursor::invalid();
     }
 
     return ret;
 }
 
 void KateViewInternal::mouseMoveEvent(QMouseEvent *e)
 {
     if (m_scroller->state() != QScroller::Inactive) {
         // Touchscreen is handled by scrollEvent()
         return;
     }
     KTextEditor::Cursor newPosition = coordinatesToCursor(e->pos(), false);
     if (newPosition != m_mouse) {
         m_mouse = newPosition;
         mouseMoved();
     }
 
     if (e->buttons() == Qt::NoButton) {
         auto noteData = inlineNoteAt(e->globalPos());
         auto focusChanged = false;
         if (noteData.m_position.isValid()) {
             if (!m_activeInlineNote.m_position.isValid()) {
                 // no active note -- focus in
                 tagLine(noteData.m_position);
                 focusChanged = true;
                 noteData.m_underMouse = true;
                 noteData.m_provider->inlineNoteFocusInEvent(KTextEditor::InlineNote(noteData), e->globalPos());
                 m_activeInlineNote = noteData;
             } else {
                 noteData.m_provider->inlineNoteMouseMoveEvent(KTextEditor::InlineNote(noteData), e->globalPos());
             }
         } else if (m_activeInlineNote.m_position.isValid()) {
             tagLine(m_activeInlineNote.m_position);
             focusChanged = true;
             m_activeInlineNote.m_underMouse = false;
             m_activeInlineNote.m_provider->inlineNoteFocusOutEvent(KTextEditor::InlineNote(m_activeInlineNote));
             m_activeInlineNote = {};
         }
         if (focusChanged) {
             // the note might change its appearance in reaction to the focus event
             updateDirty();
         }
     }
 
     if (e->buttons() & Qt::LeftButton) {
         if (m_dragInfo.state == diPending) {
             // we had a mouse down, but haven't confirmed a drag yet
             // if the mouse has moved sufficiently, we will confirm
             QPoint p(e->pos() - m_dragInfo.start);
 
             // we've left the drag square, we can start a real drag operation now
             if (p.manhattanLength() > QApplication::startDragDistance()) {
                 doDrag();
             }
 
             return;
         } else if (m_dragInfo.state == diDragging) {
             // Don't do anything after a canceled drag until the user lets go of
             // the mouse button!
             return;
         }
 
         m_mouseX = e->x();
         m_mouseY = e->y();
 
         m_scrollX = 0;
         m_scrollY = 0;
         int d = renderer()->lineHeight();
 
         if (m_mouseX < 0) {
             m_scrollX = -d;
         }
 
         if (m_mouseX > width()) {
             m_scrollX = d;
         }
 
         if (m_mouseY < 0) {
             m_mouseY = 0;
             m_scrollY = -d;
         }
 
         if (m_mouseY > height()) {
             m_mouseY = height();
             m_scrollY = d;
         }
 
         if (!m_scrollY) {
             // We are on top of line number area and dragging
             // Since we never get negative y, ensure to scroll up
             // a bit otherwise we get stuck on the topview line
             if (!m_mouseY) {
                 m_scrollY -= d;
             }
             placeCursor(QPoint(m_mouseX, m_mouseY), true);
         }
     } else {
         if (view()->config()->textDragAndDrop() && isTargetSelected(e->pos())) {
             // mouse is over selected text. indicate that the text is draggable by setting
             // the arrow cursor as other Qt text editing widgets do
             if (m_mouseCursor != Qt::ArrowCursor) {
                 m_mouseCursor = Qt::ArrowCursor;
                 setCursor(m_mouseCursor);
             }
         } else {
             // normal text cursor
             if (m_mouseCursor != Qt::IBeamCursor) {
                 m_mouseCursor = Qt::IBeamCursor;
                 setCursor(m_mouseCursor);
             }
         }
         // We need to check whether the mouse position is actually within the widget,
         // because other widgets like the icon border forward their events to this,
         // and we will create invalid text hint requests if we don't check
         if (textHintsEnabled() && geometry().contains(parentWidget()->mapFromGlobal(e->globalPos()))) {
             if (QToolTip::isVisible()) {
                 QToolTip::hideText();
             }
             m_textHintTimer.start(m_textHintDelay);
             m_textHintPos = e->pos();
         }
     }
 }
 
 void KateViewInternal::updateDirty()
 {
     const int h = renderer()->lineHeight();
 
     int currentRectStart = -1;
     int currentRectEnd = -1;
 
     QRegion updateRegion;
 
     {
         for (int i = 0; i < cache()->viewCacheLineCount(); ++i) {
             if (cache()->viewLine(i).isDirty()) {
                 if (currentRectStart == -1) {
                     currentRectStart = h * i;
                     currentRectEnd = h;
                 } else {
                     currentRectEnd += h;
                 }
 
             } else if (currentRectStart != -1) {
                 updateRegion += QRect(0, currentRectStart, width(), currentRectEnd);
                 currentRectStart = -1;
                 currentRectEnd = -1;
             }
         }
     }
 
     if (currentRectStart != -1) {
         updateRegion += QRect(0, currentRectStart, width(), currentRectEnd);
     }
 
     if (!updateRegion.isEmpty()) {
         if (debugPainting) {
             qCDebug(LOG_KTE) << "Update dirty region " << updateRegion;
         }
         update(updateRegion);
     }
 }
 
 void KateViewInternal::hideEvent(QHideEvent *e)
 {
     Q_UNUSED(e);
     if (view()->isCompletionActive()) {
         view()->completionWidget()->abortCompletion();
     }
 }
 
 void KateViewInternal::paintEvent(QPaintEvent *e)
 {
     if (debugPainting) {
         qCDebug(LOG_KTE) << "GOT PAINT EVENT: Region" << e->region();
     }
 
     const QRect &unionRect = e->rect();
 
     int xStart = startX() + unionRect.x();
     int xEnd = xStart + unionRect.width();
     uint h = renderer()->lineHeight();
     uint startz = (unionRect.y() / h);
     uint endz = startz + 1 + (unionRect.height() / h);
     uint lineRangesSize = cache()->viewCacheLineCount();
     const KTextEditor::Cursor pos = m_cursor;
 
     QPainter paint(this);
 
     // THIS IS ULTRA EVIL AND ADDS STRANGE RENDERING ARTIFACTS WITH SCALING!!!!
     // SEE BUG https://bugreports.qt.io/browse/QTBUG-66036
     // paint.setRenderHints(QPainter::TextAntialiasing);
 
     paint.save();
 
     renderer()->setCaretStyle(m_currentInputMode->caretStyle());
     renderer()->setShowTabs(doc()->config()->showTabs());
     renderer()->setShowSpaces(doc()->config()->showSpaces());
     renderer()->updateMarkerSize();
 
     // paint line by line
     // this includes parts that span areas without real lines
     // translate to first line to paint
     paint.translate(unionRect.x(), startz * h);
     for (uint z = startz; z <= endz; z++) {
         // paint regions without lines mapped to
         if ((z >= lineRangesSize) || (cache()->viewLine(z).line() == -1)) {
             if (!(z >= lineRangesSize)) {
                 cache()->viewLine(z).setDirty(false);
             }
             paint.fillRect(0, 0, unionRect.width(), h, renderer()->config()->backgroundColor());
         }
 
         // paint text lines
         else {
             // If viewLine() returns non-zero, then a document line was split
             // in several visual lines, and we're trying to paint visual line
             // that is not the first.  In that case, this line was already
             // painted previously, since KateRenderer::paintTextLine paints
             // all visual lines.
             //
             // Except if we're at the start of the region that needs to
             // be painted -- when no previous calls to paintTextLine were made.
             KateTextLayout &thisLine = cache()->viewLine(z);
             if (!thisLine.viewLine() || z == startz) {
                 // paint our line
                 // set clipping region to only paint the relevant parts
                 paint.save();
                 paint.translate(QPoint(0, h * -thisLine.viewLine()));
 
                 // compute rect for line, fill the stuff
                 // important: as we allow some ARGB colors for other stuff, it is REALLY important to fill the full range once!
                 const QRectF lineRect(0, 0, unionRect.width(), h * thisLine.kateLineLayout()->viewLineCount());
                 paint.fillRect(lineRect, renderer()->config()->backgroundColor());
 
                 // THIS IS ULTRA EVIL AND ADDS STRANGE RENDERING ARTIFACTS WITH SCALING!!!!
                 // SEE BUG https://bugreports.qt.io/browse/QTBUG-66036
                 // => using a QRectF solves the cut of 1 pixel, the same call with QRect does create artifacts!
                 paint.setClipRect(lineRect);
                 renderer()->paintTextLine(paint, thisLine.kateLineLayout(), xStart, xEnd, &pos);
                 paint.restore();
 
                 // line painted, reset and state + mark line as non-dirty
                 thisLine.setDirty(false);
             }
         }
 
         // translate to next line
         paint.translate(0, h);
     }
 
     paint.restore();
 
     if (m_textAnimation) {
         m_textAnimation->draw(paint);
     }
 }
 
 void KateViewInternal::resizeEvent(QResizeEvent *e)
 {
     bool expandedHorizontally = width() > e->oldSize().width();
     bool expandedVertically = height() > e->oldSize().height();
     bool heightChanged = height() != e->oldSize().height();
 
     m_dummy->setFixedSize(m_lineScroll->width(), m_columnScroll->sizeHint().height());
     m_madeVisible = false;
 
     // resize the bracket match preview
     if (m_bmPreview) {
         showBracketMatchPreview();
     }
 
     if (heightChanged) {
         setAutoCenterLines(m_autoCenterLines, false);
         m_cachedMaxStartPos.setPosition(-1, -1);
     }
 
     if (view()->dynWordWrap()) {
         bool dirtied = false;
 
         for (int i = 0; i < cache()->viewCacheLineCount(); i++) {
             // find the first dirty line
             // the word wrap updateView algorithm is forced to check all lines after a dirty one
             KateTextLayout viewLine = cache()->viewLine(i);
 
             if (viewLine.wrap() || viewLine.isRightToLeft() || viewLine.width() > width()) {
                 dirtied = true;
                 viewLine.setDirty();
                 break;
             }
         }
 
         if (dirtied || heightChanged) {
             updateView(true);
             m_leftBorder->update();
         }
     } else {
         updateView();
 
         if (expandedHorizontally && startX() > 0) {
             scrollColumns(startX() - (width() - e->oldSize().width()));
         }
     }
 
     if (width() < e->oldSize().width() && !view()->wrapCursor()) {
         // May have to restrain cursor to new smaller width...
         if (m_cursor.column() > doc()->lineLength(m_cursor.line())) {
             KateTextLayout thisLine = currentLayout(m_cursor);
 
             KTextEditor::Cursor newCursor(m_cursor.line(),
                                           thisLine.endCol() + ((width() - thisLine.xOffset() - (thisLine.width() - startX())) / renderer()->spaceWidth()) - 1);
             if (newCursor.column() < m_cursor.column()) {
                 updateCursor(newCursor);
             }
         }
     }
 
     if (expandedVertically) {
         KTextEditor::Cursor max = maxStartPos();
         if (startPos() > max) {
             scrollPos(max);
             return; // already fired displayRangeChanged
         }
     }
     Q_EMIT view()->displayRangeChanged(m_view);
 }
 
 void KateViewInternal::moveEvent(QMoveEvent *e)
 {
     // move the bracket match preview to the new location
     if (e->pos() != e->oldPos() && m_bmPreview) {
         showBracketMatchPreview();
     }
 
     QWidget::moveEvent(e);
 }
 
 void KateViewInternal::scrollTimeout()
 {
     if (m_scrollX || m_scrollY) {
         const int scrollTo = startPos().line() + (m_scrollY / (int)renderer()->lineHeight());
         placeCursor(QPoint(m_mouseX, m_mouseY), true);
         scrollLines(scrollTo);
     }
 }
 
 void KateViewInternal::cursorTimeout()
 {
     if (!debugPainting && m_currentInputMode->blinkCaret()) {
         renderer()->setDrawCaret(!renderer()->drawCaret());
         paintCursor();
     }
 }
 
 void KateViewInternal::textHintTimeout()
 {
     m_textHintTimer.stop();
 
     KTextEditor::Cursor c = coordinatesToCursor(m_textHintPos, false);
     if (!c.isValid()) {
         return;
     }
 
     QStringList textHints;
     for (KTextEditor::TextHintProvider *const p : m_textHintProviders) {
         if (!p) {
             continue;
         }
 
         const QString hint = p->textHint(m_view, c);
         if (!hint.isEmpty()) {
             textHints.append(hint);
         }
     }
 
     if (!textHints.isEmpty()) {
         qCDebug(LOG_KTE) << "Hint text: " << textHints;
         QString hint;
         for (const QString &str : std::as_const(textHints)) {
             hint += QStringLiteral("<p>%1</p>").arg(str);
         }
         QPoint pos(startX() + m_textHintPos.x(), m_textHintPos.y());
         QToolTip::showText(mapToGlobal(pos), hint);
     }
 }
 
 void KateViewInternal::focusInEvent(QFocusEvent *)
 {
     if (QApplication::cursorFlashTime() > 0) {
         m_cursorTimer.start(QApplication::cursorFlashTime() / 2);
     }
 
     paintCursor();
 
     doc()->setActiveView(m_view);
 
     // this will handle focus stuff in kateview
     view()->slotGotFocus();
 }
 
 void KateViewInternal::focusOutEvent(QFocusEvent *)
 {
     // if (view()->isCompletionActive())
     // view()->abortCompletion();
 
     m_cursorTimer.stop();
     view()->renderer()->setDrawCaret(true);
     paintCursor();
 
     m_textHintTimer.stop();
 
     view()->slotLostFocus();
 
     hideBracketMatchPreview();
 }
 
 void KateViewInternal::doDrag()
 {
     m_dragInfo.state = diDragging;
     m_dragInfo.dragObject = new QDrag(this);
     std::unique_ptr<QMimeData> mimeData(new QMimeData());
     mimeData->setText(view()->selectionText());
 
     const auto startCur = view()->selectionRange().start();
     const auto endCur = view()->selectionRange().end();
     if (!startCur.isValid() || !endCur.isValid()) {
         return;
     }
 
     int startLine = startCur.line();
     int endLine = endCur.line();
 
     /**
      * Get real first and last visible line nos.
      * This is important as startLine() / endLine() are virtual and we can't use
      * them here
      */
     const int firstVisibleLine = view()->firstDisplayedLineInternal(KTextEditor::View::RealLine);
     const int lastVisibleLine = view()->lastDisplayedLineInternal(KTextEditor::View::RealLine);
 
     // get visible selected lines
     for (int l = startLine; l <= endLine; ++l) {
         if (l >= firstVisibleLine) {
             break;
         }
         ++startLine;
     }
     for (int l = endLine; l >= startLine; --l) {
         if (l <= lastVisibleLine) {
             break;
         }
         --endLine;
     }
 
     // calculate the height / width / scale
     int w = 0;
     int h = 0;
     const QFontMetricsF &fm = renderer()->currentFontMetrics();
     for (int l = startLine; l <= endLine; ++l) {
         w = std::max((int)fm.horizontalAdvance(doc()->line(l)), w);
         h += renderer()->lineHeight();
     }
     qreal scale = h > m_view->height() / 2 ? 0.75 : 1.0;
 
     // Calculate start x pos on start line
     int sX = 0;
     if (startLine == startCur.line()) {
         sX = renderer()->cursorToX(cache()->textLayout(startCur), startCur, !view()->wrapCursor());
     }
 
     // Calculate end x pos on end line
     int eX = 0;
     if (endLine == endCur.line()) {
         eX = renderer()->cursorToX(cache()->textLayout(endCur), endCur, !view()->wrapCursor());
     }
 
     // These are the occurunce highlights, the ones you get when you select a word
     // We clear them here so that they don't come up in the dragged pixmap
     // After we are done creating the pixmap, we restore them
     if (view()->selection()) {
         view()->clearHighlights();
     }
 
     // Create a pixmap this selection
     const qreal dpr = devicePixelRatioF();
     QPixmap pixmap(w * dpr, h * dpr);
     if (!pixmap.isNull()) {
         pixmap.setDevicePixelRatio(dpr);
         pixmap.fill(Qt::transparent);
         renderer()->paintSelection(&pixmap, startLine, sX, endLine, eX, scale);
 
         if (view()->selection()) {
             // Tell the view to restore the highlights
             Q_EMIT view()->selectionChanged(view());
         }
     }
 
     // Calculate position where pixmap will appear when user
     // starts dragging
     const int x = 0;
     /**
      * lineToVisibleLine() = real line => virtual line
      * This is necessary here because if there is a folding in the current
      * view lines, the y pos can be incorrect. So, we make sure to convert
      * it to virtual line before calculating y
      */
     const int y = lineToY(view()->m_textFolding.lineToVisibleLine(startLine));
     const QPoint pos = mapFromGlobal(QCursor::pos()) - QPoint(x, y);
 
     m_dragInfo.dragObject->setPixmap(pixmap);
     m_dragInfo.dragObject->setHotSpot(pos);
     m_dragInfo.dragObject->setMimeData(mimeData.release());
     m_dragInfo.dragObject->exec(Qt::MoveAction | Qt::CopyAction);
 }
 
 void KateViewInternal::dragEnterEvent(QDragEnterEvent *event)
 {
     if (event->source() == this) {
         event->setDropAction(Qt::MoveAction);
     }
     event->setAccepted((event->mimeData()->hasText() && doc()->isReadWrite()) || event->mimeData()->hasUrls());
 }
 
 void KateViewInternal::fixDropEvent(QDropEvent *event)
 {
     if (event->source() != this) {
         event->setDropAction(Qt::CopyAction);
     } else {
         Qt::DropAction action = Qt::MoveAction;
 #ifdef Q_WS_MAC
         if (event->keyboardModifiers() & Qt::AltModifier) {
             action = Qt::CopyAction;
         }
 #else
         if (event->keyboardModifiers() & Qt::ControlModifier) {
             action = Qt::CopyAction;
         }
 #endif
         event->setDropAction(action);
     }
 }
 
 void KateViewInternal::dragMoveEvent(QDragMoveEvent *event)
 {
     // track the cursor to the current drop location
     placeCursor(event->pos(), true, false);
 
     // important: accept action to switch between copy and move mode
     // without this, the text will always be copied.
     fixDropEvent(event);
 }
 
 void KateViewInternal::dropEvent(QDropEvent *event)
 {
     // if we have urls, pass this event off to the hosting application
     if (event->mimeData()->hasUrls()) {
         Q_EMIT dropEventPass(event);
         return;
     }
 
     if (event->mimeData()->hasText() && doc()->isReadWrite()) {
         const QString text = event->mimeData()->text();
         const bool blockMode = view()->blockSelection();
 
         fixDropEvent(event);
 
         // Remember where to paste/move...
         KTextEditor::Cursor targetCursor(m_cursor);
         // Use powerful MovingCursor to track our changes we may do
         std::unique_ptr<KTextEditor::MovingCursor> targetCursor2(doc()->newMovingCursor(m_cursor));
 
         // As always need the BlockMode some special treatment
         const KTextEditor::Range selRange(view()->selectionRange());
         const KTextEditor::Cursor blockAdjust(selRange.numberOfLines(), selRange.columnWidth());
 
         // Restore the cursor position before editStart(), so that it is correctly stored for the undo action
         if (event->dropAction() != Qt::CopyAction) {
             editSetCursor(selRange.end());
         } else {
             view()->clearSelection();
         }
 
         // use one transaction
         doc()->editStart();
 
         if (event->dropAction() != Qt::CopyAction) {
             view()->removeSelectedText();
             if (targetCursor2->toCursor() != targetCursor) {
                 // Hm, multi line selection moved down, we need to adjust our dumb cursor
                 targetCursor = targetCursor2->toCursor();
             }
             doc()->insertText(targetCursor2->toCursor(), text, blockMode);
 
         } else {
             doc()->insertText(targetCursor, text, blockMode);
         }
 
         if (blockMode) {
             setSelection(KTextEditor::Range(targetCursor, targetCursor + blockAdjust));
             editSetCursor(targetCursor + blockAdjust);
         } else {
             setSelection(KTextEditor::Range(targetCursor, targetCursor2->toCursor()));
             editSetCursor(targetCursor2->toCursor()); // Just to satisfy autotest
         }
 
         doc()->editEnd();
 
         event->acceptProposedAction();
         updateView();
     }
 
     // finally finish drag and drop mode
     m_dragInfo.state = diNone;
     // important, because the eventFilter`s DragLeave does not occur
     stopDragScroll();
 }
 // END EVENT HANDLING STUFF
 
 void KateViewInternal::clear()
 {
     m_startPos.setPosition(0, 0);
     m_displayCursor = KTextEditor::Cursor(0, 0);
     m_cursor.setPosition(0, 0);
     view()->clearSecondaryCursors();
     cache()->clear();
     updateView(true);
     m_lineScroll->updatePixmap();
 }
 
 void KateViewInternal::wheelEvent(QWheelEvent *e)
 {
     // check if this event should change the font size (Ctrl pressed, angle reported and not accidentally so)
     // Note: if detectZoomingEvent() doesn't unset the ControlModifier we'll get accelerated scrolling.
     if (m_zoomEventFilter->detectZoomingEvent(e)) {
         if (e->angleDelta().y() > 0) {
             slotIncFontSizes(qreal(e->angleDelta().y()) / QWheelEvent::DefaultDeltasPerStep);
         } else if (e->angleDelta().y() < 0) {
             slotDecFontSizes(qreal(-e->angleDelta().y()) / QWheelEvent::DefaultDeltasPerStep);
         }
 
         // accept always and be done for zooming
         e->accept();
         return;
     }
 
     // handle vertical scrolling via the scrollbar
     if (e->angleDelta().y() != 0) {
         // compute distance
         auto sign = m_lineScroll->invertedControls() ? -1 : 1;
         auto offset = sign * qreal(e->angleDelta().y()) / 120.0;
         if (e->modifiers() & Qt::ShiftModifier) {
             const auto pageStep = m_lineScroll->pageStep();
             offset = qBound(-pageStep, int(offset * pageStep), pageStep);
         } else {
             offset *= QApplication::wheelScrollLines();
         }
 
         // handle accumulation
         m_accumulatedScroll += offset - int(offset);
         const auto extraAccumulated = int(m_accumulatedScroll);
         m_accumulatedScroll -= extraAccumulated;
 
         // do scroll
         scrollViewLines(int(offset) + extraAccumulated);
         e->accept();
     }
 
     // handle horizontal scrolling via the scrollbar
     if (e->angleDelta().x() != 0) {
         // if we have dyn word wrap, we should ignore the scroll events
         if (view()->dynWordWrap()) {
             e->accept();
             return;
         }
 
         // if we scroll up/down we do not want to trigger unintended sideways scrolls
         if (qAbs(e->angleDelta().y()) > qAbs(e->angleDelta().x())) {
             e->accept();
             return;
         }
 
         if (QApplication::sendEvent(m_columnScroll, e)) {
             e->accept();
         }
     }
 
     // hide bracket match preview so that it won't linger while scrolling'
     hideBracketMatchPreview();
 }
 
 void KateViewInternal::scrollPrepareEvent(QScrollPrepareEvent *event)
 {
     int lineHeight = renderer()->lineHeight();
     event->setViewportSize(QSizeF(0.0, 0.0));
     event->setContentPosRange(QRectF(0.0, 0.0, 0.0, m_lineScroll->maximum() * lineHeight));
     event->setContentPos(QPointF(0.0, m_lineScroll->value() * lineHeight));
     event->accept();
 }
 
 void KateViewInternal::scrollEvent(QScrollEvent *event)
 {
     // FIXME Add horizontal scrolling, overscroll, scroll between lines, and word wrap awareness
     KTextEditor::Cursor newPos((int) event->contentPos().y() / renderer()->lineHeight(), 0);
     scrollPos(newPos);
     event->accept();
 }
 
 void KateViewInternal::startDragScroll()
 {
     if (!m_dragScrollTimer.isActive()) {
         m_dragScrollTimer.start(s_scrollTime);
     }
 }
 
 void KateViewInternal::stopDragScroll()
 {
     m_dragScrollTimer.stop();
     updateView();
 }
 
 void KateViewInternal::doDragScroll()
 {
     QPoint p = this->mapFromGlobal(QCursor::pos());
 
     int dx = 0;
     int dy = 0;
     if (p.y() < s_scrollMargin) {
         dy = p.y() - s_scrollMargin;
     } else if (p.y() > height() - s_scrollMargin) {
         dy = s_scrollMargin - (height() - p.y());
     }
 
     if (p.x() < s_scrollMargin) {
         dx = p.x() - s_scrollMargin;
     } else if (p.x() > width() - s_scrollMargin) {
         dx = s_scrollMargin - (width() - p.x());
     }
 
     dy /= 4;
 
     if (dy) {
         scrollLines(startLine() + dy);
     }
 
     if (columnScrollingPossible() && dx) {
         scrollColumns(qMin(startX() + dx, m_columnScroll->maximum()));
     }
 
     if (!dy && !dx) {
         stopDragScroll();
     }
 }
 
 void KateViewInternal::registerTextHintProvider(KTextEditor::TextHintProvider *provider)
 {
     if (std::find(m_textHintProviders.cbegin(), m_textHintProviders.cend(), provider) == m_textHintProviders.cend()) {
         m_textHintProviders.push_back(provider);
     }
 
     // we have a client, so start timeout
     m_textHintTimer.start(m_textHintDelay);
 }
 
 void KateViewInternal::unregisterTextHintProvider(KTextEditor::TextHintProvider *provider)
 {
     const auto it = std::find(m_textHintProviders.cbegin(), m_textHintProviders.cend(), provider);
     if (it != m_textHintProviders.cend()) {
         m_textHintProviders.erase(it);
     }
 
     if (m_textHintProviders.empty()) {
         m_textHintTimer.stop();
     }
 }
 
 void KateViewInternal::setTextHintDelay(int delay)
 {
     if (delay <= 0) {
         m_textHintDelay = 200; // ms
     } else {
         m_textHintDelay = delay; // ms
     }
 }
 
 int KateViewInternal::textHintDelay() const
 {
     return m_textHintDelay;
 }
 
 bool KateViewInternal::textHintsEnabled()
 {
     return !m_textHintProviders.empty();
 }
 
 // BEGIN EDIT STUFF
 void KateViewInternal::editStart()
 {
     editSessionNumber++;
 
     if (editSessionNumber > 1) {
         return;
     }
 
     editIsRunning = true;
     editOldCursor = m_cursor;
     editOldSelection = view()->selectionRange();
 }
 
 void KateViewInternal::editEnd(int editTagLineStart, int editTagLineEnd, bool tagFrom)
 {
     if (editSessionNumber == 0) {
         return;
     }
 
     editSessionNumber--;
 
     if (editSessionNumber > 0) {
         return;
     }
 
     // fix start position, might have moved from column 0
     // try to clever calculate the right start column for the tricky dyn word wrap case
     int col = 0;
     if (view()->dynWordWrap()) {
         if (KateLineLayoutPtr layout = cache()->line(startLine())) {
             int index = layout->viewLineForColumn(startPos().column());
             if (index >= 0 && index < layout->viewLineCount()) {
                 col = layout->viewLine(index).startCol();
             }
         }
     }
     m_startPos.setPosition(startLine(), col);
 
     if (tagFrom && (editTagLineStart <= int(view()->textFolding().visibleLineToLine(startLine())))) {
         tagAll();
     } else {
         tagLines(editTagLineStart, tagFrom ? qMax(doc()->lastLine() + 1, editTagLineEnd) : editTagLineEnd, true);
     }
 
     if (editOldCursor == m_cursor.toCursor()) {
         updateBracketMarks();
     }
 
     updateView(true);
 
     if (editOldCursor != m_cursor.toCursor() || m_view == doc()->activeView()) {
         // Only scroll the view to the cursor if the insertion happens at the cursor.
         // This might not be the case for e.g. collaborative editing, when a remote user
         // inserts text at a position not at the caret.
         if (m_cursor.line() >= editTagLineStart && m_cursor.line() <= editTagLineEnd) {
             m_madeVisible = false;
             updateCursor(m_cursor, true);
         }
     }
 
     // selection changed?
     // fixes bug 316226
     if (editOldSelection != view()->selectionRange()
         || (editOldSelection.isValid() && !editOldSelection.isEmpty()
             && !(editTagLineStart > editOldSelection.end().line() && editTagLineEnd < editOldSelection.start().line()))) {
         Q_EMIT view()->selectionChanged(m_view);
     }
 
     editIsRunning = false;
 }
 
 void KateViewInternal::editSetCursor(const KTextEditor::Cursor _cursor)
 {
     if (m_cursor.toCursor() != _cursor) {
         m_cursor.setPosition(_cursor);
     }
 }
 // END
 
 void KateViewInternal::viewSelectionChanged()
 {
     if (!view()->selection()) {
         m_selectAnchor = KTextEditor::Cursor::invalid();
     } else {
         const auto r = view()->selectionRange();
         m_selectAnchor = r.start() == m_cursor ? r.end() : r.start();
     }
     // Do NOT nuke the entire range! The reason is that a shift+DC selection
     // might (correctly) set the range to be empty (i.e. start() == end()), and
     // subsequent dragging might shrink the selection into non-existence. When
     // this happens, we use the cached end to restore the cached start so that
     // updateSelection is not confused. See also comments in updateSelection.
     m_selectionCached.setStart(KTextEditor::Cursor::invalid());
     updateMicroFocus();
 }
 
 KateLayoutCache *KateViewInternal::cache() const
 {
     return m_layoutCache;
 }
 
 KTextEditor::Cursor KateViewInternal::toRealCursor(const KTextEditor::Cursor virtualCursor) const
 {
     return KTextEditor::Cursor(view()->textFolding().visibleLineToLine(virtualCursor.line()), virtualCursor.column());
 }
 
 KTextEditor::Cursor KateViewInternal::toVirtualCursor(const KTextEditor::Cursor realCursor) const
 {
     // only convert valid lines, folding doesn't like invalid input!
     // don't validate whole cursor, column might be -1
     if (realCursor.line() < 0) {
         return KTextEditor::Cursor::invalid();
     }
 
     return KTextEditor::Cursor(view()->textFolding().lineToVisibleLine(realCursor.line()), realCursor.column());
 }
 
 KateRenderer *KateViewInternal::renderer() const
 {
     return view()->renderer();
 }
 
 void KateViewInternal::mouseMoved()
 {
     view()->notifyMousePositionChanged(m_mouse);
     view()->updateRangesIn(KTextEditor::Attribute::ActivateMouseIn);
 }
 
 void KateViewInternal::cursorMoved()
 {
     view()->updateRangesIn(KTextEditor::Attribute::ActivateCaretIn);
 
 #ifndef QT_NO_ACCESSIBILITY
     if (QAccessible::isActive()) {
         QAccessibleTextCursorEvent ev(this, static_cast<KateViewAccessible *>(QAccessible::queryAccessibleInterface(this))->positionFromCursor(this, m_cursor));
         QAccessible::updateAccessibility(&ev);
     }
 #endif
 }
 
 KTextEditor::DocumentPrivate *KateViewInternal::doc()
 {
     return m_view->doc();
 }
 
 KTextEditor::DocumentPrivate *KateViewInternal::doc() const
 {
     return m_view->doc();
 }
 
 bool KateViewInternal::rangeAffectsView(KTextEditor::Range range, bool realCursors) const
 {
     int startLine = KateViewInternal::startLine();
     int endLine = startLine + (int)m_visibleLineCount;
 
     if (realCursors) {
         startLine = (int)view()->textFolding().visibleLineToLine(startLine);
         endLine = (int)view()->textFolding().visibleLineToLine(endLine);
     }
 
     return (range.end().line() >= startLine) || (range.start().line() <= endLine);
 }
 
 // BEGIN IM INPUT STUFF
 QVariant KateViewInternal::inputMethodQuery(Qt::InputMethodQuery query) const
 {
     switch (query) {
     case Qt::ImCursorRectangle: {
         // Cursor placement code is changed for Asian input method that
         // shows candidate window. This behavior is same as Qt/E 2.3.7
         // which supports Asian input methods. Asian input methods need
         // start point of IM selection text to place candidate window as
         // adjacent to the selection text.
         //
         // in Qt5, cursor rectangle is used as QRectF internally, and it
         // will be checked by QRectF::isValid(), which will mark rectangle
         // with width == 0 or height == 0 as invalid.
         auto lineHeight = renderer()->lineHeight();
         return QRect(cursorToCoordinate(m_cursor, true, false), QSize(1, lineHeight ? lineHeight : 1));
     }
 
     case Qt::ImFont:
         return renderer()->currentFont();
 
     case Qt::ImCursorPosition:
         return m_cursor.column();
 
     case Qt::ImAnchorPosition:
         // If selectAnchor is at the same line, return the real anchor position
         // Otherwise return the same position of cursor
         if (view()->selection() && m_selectAnchor.line() == m_cursor.line()) {
             return m_selectAnchor.column();
         } else {
             return m_cursor.column();
         }
 
     case Qt::ImSurroundingText:
         if (Kate::TextLine l = doc()->kateTextLine(m_cursor.line())) {
             return l->text();
         } else {
             return QString();
         }
 
     case Qt::ImCurrentSelection:
         if (view()->selection()) {
             return view()->selectionText();
         } else {
             return QString();
         }
     default:
         /* values: ImMaximumTextLength */
         break;
     }
 
     return QWidget::inputMethodQuery(query);
 }
 
 void KateViewInternal::inputMethodEvent(QInputMethodEvent *e)
 {
     if (doc()->readOnly()) {
         e->ignore();
         return;
     }
 
     // qCDebug(LOG_KTE) << "Event: cursor" << m_cursor << "commit" << e->commitString() << "preedit" << e->preeditString() << "replacement start" <<
     // e->replacementStart() << "length" << e->replacementLength();
 
     if (!m_imPreeditRange) {
         m_imPreeditRange.reset(
             doc()->newMovingRange(KTextEditor::Range(m_cursor, m_cursor), KTextEditor::MovingRange::ExpandLeft | KTextEditor::MovingRange::ExpandRight));
     }
 
     if (!m_imPreeditRange->toRange().isEmpty()) {
         doc()->inputMethodStart();
         doc()->removeText(*m_imPreeditRange);
         doc()->inputMethodEnd();
     }
 
     if (!e->commitString().isEmpty() || e->replacementLength() || !e->preeditString().isEmpty()) {
         view()->removeSelectedText();
     }
 
     if (!e->commitString().isEmpty() || e->replacementLength()) {
         KTextEditor::Range preeditRange = *m_imPreeditRange;
 
         KTextEditor::Cursor start(m_imPreeditRange->start().line(), m_imPreeditRange->start().column() + e->replacementStart());
         KTextEditor::Cursor removeEnd = start + KTextEditor::Cursor(0, e->replacementLength());
 
         doc()->editStart();
         if (start != removeEnd) {
             doc()->removeText(KTextEditor::Range(start, removeEnd));
         }
 
         // if the input method event is text that should be inserted, call KTextEditor::DocumentPrivate::typeChars()
         // with the text. that method will handle the input and take care of overwrite mode, etc.
         doc()->typeChars(m_view, e->commitString());
 
         doc()->editEnd();
 
         // Revert to the same range as above
         m_imPreeditRange->setRange(preeditRange);
     }
 
     if (!e->preeditString().isEmpty()) {
         doc()->inputMethodStart();
         doc()->insertText(m_imPreeditRange->start(), e->preeditString());
         doc()->inputMethodEnd();
         // The preedit range gets automatically repositioned
     }
 
     // Finished this input method context?
     if (m_imPreeditRange && e->preeditString().isEmpty()) {
         // delete the range and reset the pointer
         m_imPreeditRange.reset();
         m_imPreeditRangeChildren.clear();
 
         if (QApplication::cursorFlashTime() > 0) {
             renderer()->setDrawCaret(false);
         }
         renderer()->setCaretOverrideColor(QColor());
 
         e->accept();
         return;
     }
 
     KTextEditor::Cursor newCursor = m_cursor;
     bool hideCursor = false;
     QColor caretColor;
 
     if (m_imPreeditRange) {
         m_imPreeditRangeChildren.clear();
 
         int decorationColumn = 0;
         const auto &attributes = e->attributes();
         for (auto &a : attributes) {
             if (a.type == QInputMethodEvent::Cursor) {
                 const int cursor = qMin(a.start, e->preeditString().length());
                 newCursor = m_imPreeditRange->start() + KTextEditor::Cursor(0, cursor);
                 hideCursor = !a.length;
                 QColor c = qvariant_cast<QColor>(a.value);
                 if (c.isValid()) {
                     caretColor = c;
                 }
 
             } else if (a.type == QInputMethodEvent::TextFormat) {
                 QTextCharFormat f = qvariant_cast<QTextFormat>(a.value).toCharFormat();
                 const int start = qMin(a.start, e->preeditString().length());
                 const int end = qMin(a.start + a.length, e->preeditString().length());
                 if (f.isValid() && decorationColumn <= start && start != end) {
                     const KTextEditor::MovingCursor &preEditRangeStart = m_imPreeditRange->start();
                     const int startLine = preEditRangeStart.line();
                     const int startCol = preEditRangeStart.column();
                     KTextEditor::Range fr(startLine, startCol + start, startLine, startCol + end);
                     std::unique_ptr<KTextEditor::MovingRange> formatRange(doc()->newMovingRange(fr));
                     KTextEditor::Attribute::Ptr attribute(new KTextEditor::Attribute());
                     attribute->merge(f);
                     formatRange->setAttribute(attribute);
                     decorationColumn = end;
                     m_imPreeditRangeChildren.push_back(std::move(formatRange));
                 }
             }
         }
     }
 
     renderer()->setDrawCaret(hideCursor);
     renderer()->setCaretOverrideColor(caretColor);
 
     if (newCursor != m_cursor.toCursor()) {
         updateCursor(newCursor);
     }
 
     e->accept();
 }
 
 // END IM INPUT STUFF
 
 void KateViewInternal::flashChar(const KTextEditor::Cursor pos, KTextEditor::Attribute::Ptr attribute)
 {
     Q_ASSERT(pos.isValid());
     Q_ASSERT(attribute.constData());
 
     // if line is folded away, do nothing
     if (!view()->textFolding().isLineVisible(pos.line())) {
         return;
     }
 
     KTextEditor::Range range(pos, KTextEditor::Cursor(pos.line(), pos.column() + 1));
     if (m_textAnimation) {
         m_textAnimation->deleteLater();
     }
     m_textAnimation = new KateTextAnimation(range, std::move(attribute), this);
 }
 
 void KateViewInternal::showBracketMatchPreview()
 {
     // only show when main window is active
     if (window() && !window()->isActiveWindow()) {
         return;
     }
 
     const KTextEditor::Cursor openBracketCursor = m_bmStart->start();
     // make sure that the matching bracket is an opening bracket that is not visible on the current view, and that the preview won't be blocking the cursor
     if (m_cursor == openBracketCursor || toVirtualCursor(openBracketCursor).line() >= startLine() || m_cursor.line() - startLine() < 2) {
         hideBracketMatchPreview();
         return;
     }
 
     if (!m_bmPreview) {
         m_bmPreview.reset(new KateTextPreview(m_view, this));
         m_bmPreview->setAttribute(Qt::WA_ShowWithoutActivating);
         m_bmPreview->setFrameStyle(QFrame::Box);
     }
 
     const int previewLine = openBracketCursor.line();
     KateRenderer *const renderer_ = renderer();
     KateLineLayoutPtr lineLayout(new KateLineLayout(*renderer_));
     lineLayout->setLine(previewLine, -1);
 
     // If the opening bracket is on its own line, start preview at the line above it instead (where the context is likely to be)
     const int col = lineLayout->textLine()->firstChar();
     if (previewLine > 0 && (col == -1 || col == openBracketCursor.column())) {
         lineLayout->setLine(previewLine - 1, lineLayout->virtualLine() - 1);
     }
 
     renderer_->layoutLine(lineLayout, -1 /* no wrap */, false /* no layout cache */);
     const int lineWidth =
         qBound(m_view->width() / 5, int(lineLayout->width() + renderer_->spaceWidth() * 2), m_view->width() - m_leftBorder->width() - m_lineScroll->width());
     m_bmPreview->resize(lineWidth, renderer_->lineHeight() * 2);
     const QPoint topLeft = mapToGlobal(QPoint(0, 0));
     m_bmPreview->move(topLeft.x(), topLeft.y());
     m_bmPreview->setLine(lineLayout->virtualLine());
     m_bmPreview->setCenterView(false);
     m_bmPreview->raise();
     m_bmPreview->show();
 }
 
 void KateViewInternal::hideBracketMatchPreview()
 {
     m_bmPreview.reset();
 }
 
 void KateViewInternal::documentTextInserted(KTextEditor::Document *document, KTextEditor::Range range)
 {
 #ifndef QT_NO_ACCESSIBILITY
     if (QAccessible::isActive()) {
         QAccessibleTextInsertEvent ev(this,
                                       static_cast<KateViewAccessible *>(QAccessible::queryAccessibleInterface(this))->positionFromCursor(this, range.start()),
                                       document->text(range));
         QAccessible::updateAccessibility(&ev);
     }
 #endif
 }
 
 void KateViewInternal::documentTextRemoved(KTextEditor::Document * /*document*/, KTextEditor::Range range, const QString &oldText)
 {
 #ifndef QT_NO_ACCESSIBILITY
     if (QAccessible::isActive()) {
         QAccessibleTextRemoveEvent ev(this,
                                       static_cast<KateViewAccessible *>(QAccessible::queryAccessibleInterface(this))->positionFromCursor(this, range.start()),
                                       oldText);
         QAccessible::updateAccessibility(&ev);
     }
 #endif
 }
 
 QRect KateViewInternal::inlineNoteRect(const KateInlineNoteData &noteData) const
 {
     KTextEditor::InlineNote note(noteData);
     // compute note width and position
     const auto noteWidth = note.width();
     auto noteCursor = note.position();
 
     // The cursor might be outside of the text. In that case, clamp it to the text and
     // later on add the missing x offset.
     const auto lineLength = view()->document()->lineLength(noteCursor.line());
     int extraOffset = -noteWidth;
     if (noteCursor.column() == lineLength) {
         extraOffset = 0;
     } else if (noteCursor.column() > lineLength) {
         extraOffset = (noteCursor.column() - lineLength) * renderer()->spaceWidth();
         noteCursor.setColumn(lineLength);
     }
     auto noteStartPos = mapToGlobal(cursorToCoordinate(noteCursor, true, false));
 
     // compute the note's rect
     auto globalNoteRect = QRect(noteStartPos + QPoint{extraOffset, 0}, QSize(noteWidth, renderer()->lineHeight()));
 
     return globalNoteRect;
 }
 
 KateInlineNoteData KateViewInternal::inlineNoteAt(const QPoint &globalPos) const
 {
     // compute the associated cursor to get the right line
     const int line = coordinatesToCursor(mapFromGlobal(globalPos)).line();
     const auto inlineNotes = view()->inlineNotes(line);
     // loop over all notes and check if the point is inside it
     for (const auto &note : inlineNotes) {
         auto globalNoteRect = inlineNoteRect(note);
         if (globalNoteRect.contains(globalPos)) {
             return note;
         }
     }
     // none found -- return an invalid note
     return {};
 }
 
 bool KateViewInternal::sendMouseEventToInputContext(QMouseEvent *e)
 {
     if (!m_imPreeditRange) {
         return false;
     }
 
     KTextEditor::Cursor c = cursorForPoint(e->pos());
     if (!m_imPreeditRange->contains(c) && c != m_imPreeditRange->end()) {
         return false;
     }
 
     auto cursorPos = (c - m_imPreeditRange->start());
 
     if (cursorPos.column() >= 0) {
         if (e->type() == QEvent::MouseButtonRelease)
             QGuiApplication::inputMethod()->invokeAction(QInputMethod::Click, cursorPos.column());
         e->setAccepted(true);
         return true;
     }
     return false;
 }
 
 void KateViewInternal::commitPreedit()
 {
     if (!m_imPreeditRange) {
         return;
     }
 
     QGuiApplication::inputMethod()->commit();
 }
 
 #include "moc_kateviewinternal.cpp"