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Commit 379327b6 authored by Gustavo Carneiro's avatar Gustavo Carneiro
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Move ScrollBar methods to a new class TerminalScollBar

parent c2451f62
Hide whitespace changes
Inline Side-by-side
Showing with 404 additions and 290 deletions
src/CMakeLists.txt
View file @ 379327b6
......@@ -178,8 +178,11 @@ set(konsoleprivate_SRCS ${windowadaptors_SRCS}
widgets/RenameTabWidget.cpp
widgets/RenameTabWidget.cpp
widgets/TabTitleFormatButton.cpp
terminalDisplay/TerminalDisplay.cpp
terminalDisplay/TerminalPainter.cpp
terminalDisplay/TerminalScrollBar.cpp
widgets/TerminalDisplayAccessible.cpp
widgets/TerminalHeaderBar.cpp
widgets/ViewContainer.cpp
......
src/autotests/TerminalTest.cpp
View file @ 379327b6
......@@ -24,6 +24,7 @@
// Konsole
#include "../terminalDisplay/TerminalDisplay.h"
#include "../terminalDisplay/TerminalScrollBar.hpp"
#include "../CharacterColor.h"
#include "colorscheme/ColorScheme.h"
......@@ -34,12 +35,12 @@ void TerminalTest::testScrollBarPositions()
auto display = new TerminalDisplay(nullptr);
// ScrollBar Positions
display->setScrollBarPosition(Enum::ScrollBarLeft);
QCOMPARE(display->scrollBarPosition(), Enum::ScrollBarLeft);
display->setScrollBarPosition(Enum::ScrollBarRight);
QCOMPARE(display->scrollBarPosition(), Enum::ScrollBarRight);
display->setScrollBarPosition(Enum::ScrollBarHidden);
QCOMPARE(display->scrollBarPosition(), Enum::ScrollBarHidden);
display->scrollBar()->setScrollBarPosition(Enum::ScrollBarLeft);
QCOMPARE(display->scrollBar()->scrollBarPosition(), Enum::ScrollBarLeft);
display->scrollBar()->setScrollBarPosition(Enum::ScrollBarRight);
QCOMPARE(display->scrollBar()->scrollBarPosition(), Enum::ScrollBarRight);
display->scrollBar()->setScrollBarPosition(Enum::ScrollBarHidden);
QCOMPARE(display->scrollBar()->scrollBarPosition(), Enum::ScrollBarHidden);
delete display;
}
......
src/session/Session.cpp
View file @ 379327b6
......@@ -62,6 +62,7 @@
#include "SessionManager.h"
#include "terminalDisplay/TerminalDisplay.h"
#include "terminalDisplay/TerminalScrollBar.hpp"
using namespace Konsole;
......@@ -337,7 +338,7 @@ void Session::addView(TerminalDisplay* widget)
widget->setUsesMouseTracking(_emulation->programUsesMouseTracking());
connect(_emulation, &Konsole::Emulation::enableAlternateScrolling, widget, &Konsole::TerminalDisplay::setAlternateScrolling);
connect(_emulation, &Konsole::Emulation::enableAlternateScrolling, widget->scrollBar(), &Konsole::TerminalScrollBar::setAlternateScrolling);
connect(_emulation, &Konsole::Emulation::programBracketedPasteModeChanged, widget, &Konsole::TerminalDisplay::setBracketedPasteMode);
......
src/terminalDisplay/TerminalDisplay.cpp
View file @ 379327b6
......@@ -39,7 +39,6 @@
#include <QMimeData>
#include <QPainter>
#include <QPixmap>
#include <QScrollBar>
#include <QStyle>
#include <QTimer>
#include <QDrag>
......@@ -87,6 +86,7 @@
#include "EscapeSequenceUrlExtractor.h"
#include "TerminalPainter.hpp"
#include "TerminalScrollBar.hpp"
using namespace Konsole;
......@@ -459,7 +459,6 @@ TerminalDisplay::TerminalDisplay(QWidget* parent)
, _showTerminalSizeHint(true)
, _bidiEnabled(false)
, _usesMouseTracking(false)
, _alternateScrolling(true)
, _bracketedPasteMode(false)
, _iPntSel(QPoint(-1, -1))
, _pntSel(QPoint(-1, -1))
......@@ -472,9 +471,6 @@ TerminalDisplay::TerminalDisplay(QWidget* parent)
, _autoCopySelectedText(false)
, _copyTextAsHTML(true)
, _middleClickPasteMode(Enum::PasteFromX11Selection)
, _scrollBar(nullptr)
, _scrollbarLocation(Enum::ScrollBarRight)
, _scrollFullPage(false)
, _wordCharacters(QStringLiteral(":@-./_~"))
, _bellMode(Enum::NotifyBell)
, _allowBlinkingText(true)
......@@ -518,6 +514,7 @@ TerminalDisplay::TerminalDisplay(QWidget* parent)
, _headerBar(new TerminalHeaderBar(this))
, _searchResultRect(QRect())
, _drawOverlay(false)
, _scrollBar(nullptr)
{
// terminal applications are not designed with Right-To-Left in mind,
// so the layout is forced to Left-To-Right
......@@ -526,14 +523,13 @@ TerminalDisplay::TerminalDisplay(QWidget* parent)
_contentRect = QRect(_margin, _margin, 1, 1);
// create scroll bar for scrolling output up and down
_scrollBar = new QScrollBar(this);
_scrollBar = new TerminalScrollBar(this);
_scrollBar->setAutoFillBackground(false);
// set the scroll bar's slider to occupy the whole area of the scroll bar initially
setScroll(0, 0);
_scrollBar->setScroll(0, 0);
_scrollBar->setCursor(Qt::ArrowCursor);
_headerBar->setCursor(Qt::ArrowCursor);
connect(_headerBar, &TerminalHeaderBar::requestToggleExpansion, this, &Konsole::TerminalDisplay::requestToggleExpansion);
connect(_scrollBar, &QScrollBar::valueChanged, this, &Konsole::TerminalDisplay::scrollBarPositionChanged);
connect(_scrollBar, &QScrollBar::sliderMoved, this, &Konsole::TerminalDisplay::viewScrolledByUser);
// setup timers for blinking text
......@@ -710,6 +706,15 @@ void TerminalDisplay::setWallpaper(const ColorSchemeWallpaper::Ptr &p)
_wallpaper = p;
}
void TerminalDisplay::scrollScreenWindow(enum ScreenWindow::RelativeScrollMode mode, int amount)
{
_screenWindow->scrollBy(mode, amount, _scrollBar->scrollFullPage());
_screenWindow->setTrackOutput(_screenWindow->atEndOfOutput());
updateLineProperties();
updateImage();
viewScrolledByUser();
}
void TerminalDisplay::setRandomSeed(uint randomSeed)
{
_randomSeed = randomSeed;
......@@ -719,111 +724,6 @@ uint TerminalDisplay::randomSeed() const
return _randomSeed;
}
// scrolls the image by 'lines', down if lines > 0 or up otherwise.
//
// the terminal emulation keeps track of the scrolling of the character
// image as it receives input, and when the view is updated, it calls scrollImage()
// with the final scroll amount. this improves performance because scrolling the
// display is much cheaper than re-rendering all the text for the
// part of the image which has moved up or down.
// Instead only new lines have to be drawn
void TerminalDisplay::scrollImage(int lines , const QRect& screenWindowRegion)
{
// return if there is nothing to do
if ((lines == 0) || (_image == nullptr)) {
return;
}
// if the flow control warning is enabled this will interfere with the
// scrolling optimizations and cause artifacts. the simple solution here
// is to just disable the optimization whilst it is visible
if ((_outputSuspendedMessageWidget != nullptr) && _outputSuspendedMessageWidget->isVisible()) {
return;
}
if ((_readOnlyMessageWidget != nullptr) && _readOnlyMessageWidget->isVisible()) {
return;
}
// constrain the region to the display
// the bottom of the region is capped to the number of lines in the display's
// internal image - 2, so that the height of 'region' is strictly less
// than the height of the internal image.
QRect region = screenWindowRegion;
region.setBottom(qMin(region.bottom(), _lines - 2));
// return if there is nothing to do
if (!region.isValid()
|| (region.top() + abs(lines)) >= region.bottom()
|| _lines <= region.height()) {
return;
}
// hide terminal size label to prevent it being scrolled
if ((_resizeWidget != nullptr) && _resizeWidget->isVisible()) {
_resizeWidget->hide();
}
// Note: With Qt 4.4 the left edge of the scrolled area must be at 0
// to get the correct (newly exposed) part of the widget repainted.
//
// The right edge must be before the left edge of the scroll bar to
// avoid triggering a repaint of the entire widget, the distance is
// given by SCROLLBAR_CONTENT_GAP
//
// Set the QT_FLUSH_PAINT environment variable to '1' before starting the
// application to monitor repainting.
//
const int scrollBarWidth = _scrollBar->isHidden() ? 0 : _scrollBar->width();
const int SCROLLBAR_CONTENT_GAP = 1;
QRect scrollRect;
if (_scrollbarLocation == Enum::ScrollBarLeft) {
scrollRect.setLeft(scrollBarWidth + SCROLLBAR_CONTENT_GAP + (_highlightScrolledLinesControl.enabled ? HIGHLIGHT_SCROLLED_LINES_WIDTH : 0));
scrollRect.setRight(width());
} else {
scrollRect.setLeft(_highlightScrolledLinesControl.enabled ? HIGHLIGHT_SCROLLED_LINES_WIDTH : 0);
scrollRect.setRight(width() - scrollBarWidth - SCROLLBAR_CONTENT_GAP);
}
void* firstCharPos = &_image[ region.top() * _columns ];
void* lastCharPos = &_image[(region.top() + abs(lines)) * _columns ];
const int top = _contentRect.top() + (region.top() * _fontHeight);
const int linesToMove = region.height() - abs(lines);
const int bytesToMove = linesToMove * _columns * sizeof(Character);
Q_ASSERT(linesToMove > 0);
Q_ASSERT(bytesToMove > 0);
scrollRect.setTop( lines > 0 ? top : top + abs(lines) * _fontHeight);
scrollRect.setHeight(linesToMove * _fontHeight);
if (!scrollRect.isValid() || scrollRect.isEmpty()) {
return;
}
//scroll internal image
if (lines > 0) {
// check that the memory areas that we are going to move are valid
Q_ASSERT((char*)lastCharPos + bytesToMove <
(char*)(_image + (_lines * _columns)));
Q_ASSERT((lines * _columns) < _imageSize);
//scroll internal image down
memmove(firstCharPos , lastCharPos , bytesToMove);
} else {
// check that the memory areas that we are going to move are valid
Q_ASSERT((char*)firstCharPos + bytesToMove <
(char*)(_image + (_lines * _columns)));
//scroll internal image up
memmove(lastCharPos , firstCharPos , bytesToMove);
}
//scroll the display vertically to match internal _image
scroll(0 , _fontHeight * (-lines) , scrollRect);
}
void TerminalDisplay::processFilters()
{
......@@ -865,7 +765,7 @@ void TerminalDisplay::updateImage()
// can simply be moved up or down
// disable this shortcut for transparent konsole with scaled pixels, otherwise we get rendering artifacts, see BUG 350651
if (!(WindowSystemInfo::HAVE_TRANSPARENCY && (qApp->devicePixelRatio() > 1.0)) && _wallpaper->isNull() && !_searchBar->isVisible()) {
scrollImage(_screenWindow->scrollCount() ,
_scrollBar->scrollImage(_screenWindow->scrollCount() ,
_screenWindow->scrollRegion());
}
......@@ -879,7 +779,7 @@ void TerminalDisplay::updateImage()
const int lines = _screenWindow->windowLines();
const int columns = _screenWindow->windowColumns();
setScroll(_screenWindow->currentLine() , _screenWindow->lineCount());
_scrollBar->setScroll(_screenWindow->currentLine() , _screenWindow->lineCount());
Q_ASSERT(_usedLines <= _lines);
Q_ASSERT(_usedColumns <= _columns);
......@@ -1190,11 +1090,6 @@ void TerminalDisplay::paintFilters(QPainter& painter)
_filterChain->paint(this, painter);
}
void TerminalDisplay::highlightScrolledLinesEvent()
{
update(_highlightScrolledLinesControl.rect);
}
QRect TerminalDisplay::imageToWidget(const QRect& imageArea) const
{
QRect result;
......@@ -1342,7 +1237,7 @@ void TerminalDisplay::resizeEvent(QResizeEvent *event)
updateImage();
}
const auto scrollBarWidth = _scrollbarLocation != Enum::ScrollBarHidden
const auto scrollBarWidth = _scrollBar->scrollBarPosition() != Enum::ScrollBarHidden
? _scrollBar->width()
: 0;
const auto headerHeight = _headerBar->isVisible() ? _headerBar->height() : 0;
......@@ -1430,7 +1325,7 @@ void TerminalDisplay::calcGeometry()
_contentRect = contentsRect().adjusted(_margin + (_highlightScrolledLinesControl.enabled ? HIGHLIGHT_SCROLLED_LINES_WIDTH : 0), _margin,
-_margin - (_highlightScrolledLinesControl.enabled ? HIGHLIGHT_SCROLLED_LINES_WIDTH : 0), -_margin);
switch (_scrollbarLocation) {
switch (_scrollBar->scrollBarPosition()) {
case Enum::ScrollBarHidden :
break;
case Enum::ScrollBarLeft :
......@@ -1519,87 +1414,6 @@ void TerminalDisplay::setCenterContents(bool enable)
/* */
/* ------------------------------------------------------------------------- */
void TerminalDisplay::setScrollBarPosition(Enum::ScrollBarPositionEnum position)
{
if (_scrollbarLocation == position) {
return;
}
_scrollbarLocation = position;
applyScrollBarPosition(true);
}
void TerminalDisplay::applyScrollBarPosition(bool propagate) {
_scrollBar->setHidden(_scrollbarLocation == Enum::ScrollBarHidden);
if (propagate) {
propagateSize();
update();
}
}
void TerminalDisplay::scrollBarPositionChanged(int)
{
if (_screenWindow.isNull()) {
return;
}
_screenWindow->scrollTo(_scrollBar->value());
// if the thumb has been moved to the bottom of the _scrollBar then set
// the display to automatically track new output,
// that is, scroll down automatically
// to how new _lines as they are added
const bool atEndOfOutput = (_scrollBar->value() == _scrollBar->maximum());
_screenWindow->setTrackOutput(atEndOfOutput);
updateImage();
}
void TerminalDisplay::setScroll(int cursor, int slines)
{
// update _scrollBar if the range or value has changed,
// otherwise return
//
// setting the range or value of a _scrollBar will always trigger
// a repaint, so it should be avoided if it is not necessary
if (_scrollBar->minimum() == 0 &&
_scrollBar->maximum() == (slines - _lines) &&
_scrollBar->value() == cursor) {
return;
}
disconnect(_scrollBar, &QScrollBar::valueChanged, this, &Konsole::TerminalDisplay::scrollBarPositionChanged);
_scrollBar->setRange(0, slines - _lines);
_scrollBar->setSingleStep(1);
_scrollBar->setPageStep(_lines);
_scrollBar->setValue(cursor);
connect(_scrollBar, &QScrollBar::valueChanged, this, &Konsole::TerminalDisplay::scrollBarPositionChanged);
}
void TerminalDisplay::setScrollFullPage(bool fullPage)
{
_scrollFullPage = fullPage;
}
bool TerminalDisplay::scrollFullPage() const
{
return _scrollFullPage;
}
void TerminalDisplay::setHighlightScrolledLines(bool highlight)
{
_highlightScrolledLinesControl.enabled = highlight;
if (_highlightScrolledLinesControl.enabled && _highlightScrolledLinesControl.timer == nullptr) {
// setup timer for diming the highlight on scrolled lines
_highlightScrolledLinesControl.timer = new QTimer(this);
_highlightScrolledLinesControl.timer->setSingleShot(true);
_highlightScrolledLinesControl.timer->setInterval(250);
connect(_highlightScrolledLinesControl.timer, &QTimer::timeout, this, &Konsole::TerminalDisplay::highlightScrolledLinesEvent);
}
}
/* ------------------------------------------------------------------------- */
/* */
/* Mouse */
......@@ -2142,7 +1956,7 @@ void TerminalDisplay::wheelEvent(QWheelEvent* ev)
// Reapply scrollbar position since the scrollbar event handler
// sometimes makes the scrollbar visible when set to hidden.
// Don't call propagateSize and update, since nothing changed.
applyScrollBarPosition(false);
_scrollBar->applyScrollBarPosition(false);
Q_ASSERT(_sessionController != nullptr);
......@@ -2153,7 +1967,7 @@ void TerminalDisplay::wheelEvent(QWheelEvent* ev)
Q_ASSERT(!_sessionController->session().isNull());
if(!_usesMouseTracking && !_sessionController->session()->isPrimaryScreen() && _alternateScrolling) {
if(!_usesMouseTracking && !_sessionController->session()->isPrimaryScreen() && _scrollBar->alternateScrolling()) {
// Send simulated up / down key presses to the terminal program
// for the benefit of programs such as 'less' (which use the alternate screen)
......@@ -2549,15 +2363,6 @@ bool TerminalDisplay::usesMouseTracking() const
return _usesMouseTracking;
}
void TerminalDisplay::setAlternateScrolling(bool enable)
{
_alternateScrolling = enable;
}
bool TerminalDisplay::alternateScrolling() const
{
return _alternateScrolling;
}
void TerminalDisplay::setBracketedPasteMode(bool on)
{
_bracketedPasteMode = on;
......@@ -2948,15 +2753,6 @@ void TerminalDisplay::updateReadOnlyState(bool readonly) {
_readOnly = readonly;
}
void TerminalDisplay::scrollScreenWindow(enum ScreenWindow::RelativeScrollMode mode, int amount)
{
_screenWindow->scrollBy(mode, amount, _scrollFullPage);
_screenWindow->setTrackOutput(_screenWindow->atEndOfOutput());
updateLineProperties();
updateImage();
viewScrolledByUser();
}
void TerminalDisplay::keyPressEvent(QKeyEvent* event)
{
{ // C++17: change getCharacterPosition to return a tuple and use auto [charLine, charColumn] to extract the values.
......@@ -3338,8 +3134,8 @@ void TerminalDisplay::applyProfile(const Profile::Ptr &profile)
setVTFont(profile->font());
// set scroll-bar position
setScrollBarPosition(Enum::ScrollBarPositionEnum(profile->property<int>(Profile::ScrollBarPosition)));
setScrollFullPage(profile->property<bool>(Profile::ScrollFullPage));
_scrollBar->setScrollBarPosition(Enum::ScrollBarPositionEnum(profile->property<int>(Profile::ScrollBarPosition)));
_scrollBar->setScrollFullPage(profile->property<bool>(Profile::ScrollFullPage));
// show hint about terminal size after resizing
_showTerminalSizeHint = profile->showTerminalSizeHint();
......@@ -3361,7 +3157,7 @@ void TerminalDisplay::applyProfile(const Profile::Ptr &profile)
setCopyTextAsHTML(profile->property<bool>(Profile::CopyTextAsHTML));
// highlight lines scrolled into view (must be applied before margin/center)
setHighlightScrolledLines(profile->property<bool>(Profile::HighlightScrolledLines));
_scrollBar->setHighlightScrolledLines(profile->property<bool>(Profile::HighlightScrolledLines));
_highlightScrolledLinesControl.needToClear = true;
// margin/center
......@@ -3388,7 +3184,7 @@ void TerminalDisplay::applyProfile(const Profile::Ptr &profile)
_displayVerticalLine = profile->verticalLine();
_displayVerticalLineAtChar = profile->verticalLineAtChar();
setAlternateScrolling(profile->property<bool>(Profile::AlternateScrolling));
_scrollBar->setAlternateScrolling(profile->property<bool>(Profile::AlternateScrolling));
_dimValue = profile->dimValue();
_filterChain->setUrlHintsModifiers(Qt::KeyboardModifiers(profile->property<int>(Profile::UrlHintsModifiers)));
......
src/terminalDisplay/TerminalDisplay.h
View file @ 379327b6
......@@ -43,7 +43,6 @@ class QTimer;
class QEvent;
class QVBoxLayout;
class QKeyEvent;
class QScrollBar;
class QShowEvent;
class QHideEvent;
class QTimerEvent;
......@@ -51,6 +50,8 @@ class KMessageWidget;
namespace Konsole {
class TerminalPainter;
class TerminalScrollBar;
class FilterChain;
class TerminalImageFilterChain;
class SessionController;
......@@ -102,24 +103,6 @@ public:
/** Sets the background picture */
void setWallpaper(const ColorSchemeWallpaper::Ptr &p);
/**
* Specifies whether the terminal display has a vertical scroll bar, and if so whether it
* is shown on the left or right side of the display.
*/
void setScrollBarPosition(Enum::ScrollBarPositionEnum position);
/**
* Sets the current position and range of the display's scroll bar.
*
* @param cursor The position of the scroll bar's thumb.
* @param slines The maximum value of the scroll bar.
*/
void setScroll(int cursor, int slines);
void setScrollFullPage(bool fullPage);
bool scrollFullPage() const;
void setHighlightScrolledLines(bool highlight);
/**
* Returns the display's filter chain. When the image for the display is updated,
* the text is passed through each filter in the chain. Each filter can define
......@@ -380,9 +363,6 @@ public:
/** See setUsesMouseTracking() */
bool usesMouseTracking() const;
/** See setAlternateScrolling() */
bool alternateScrolling() const;
bool hasCompositeFocus() const
{
return _hasCompositeFocus;
......@@ -398,6 +378,12 @@ public:
void getCharacterPosition(const QPoint &widgetPoint, int &line, int &column, bool edge) const;
friend class TerminalPainter;
friend class TerminalScrollBar;
TerminalScrollBar *scrollBar()
{
return _scrollBar;
}
public Q_SLOTS:
/**
......@@ -476,15 +462,6 @@ public Q_SLOTS:
*/
void setUsesMouseTracking(bool on);
/**
* Sets the AlternateScrolling profile property which controls whether
* to emulate up/down key presses for mouse scroll wheel events.
* For more details, check the documentation of that property in the
* Profile header.
* Enabled by default.
*/
void setAlternateScrolling(bool enable);
void setBracketedPasteMode(bool on);
/**
......@@ -523,11 +500,6 @@ public Q_SLOTS:
return _colorScheme;
}
Enum::ScrollBarPositionEnum scrollBarPosition() const
{
return _scrollbarLocation;
}
Qt::Edge droppedEdge() const {
return _overlayEdge;
}
......@@ -641,10 +613,8 @@ protected:
protected Q_SLOTS:
void scrollBarPositionChanged(int value);
void blinkTextEvent();
void blinkCursorEvent();
void highlightScrolledLinesEvent();
private Q_SLOTS:
......@@ -663,18 +633,6 @@ private:
// current size in columns and lines
void showResizeNotification();
// applies changes to scrollbarLocation to the scroll bar and
// if @propagate is true, propagates size information
void applyScrollBarPosition(bool propagate = true);
// scrolls the image by a number of lines.
// 'lines' may be positive ( to scroll the image down )
// or negative ( to scroll the image up )
// 'region' is the part of the image to scroll - currently only
// the top, bottom and height of 'region' are taken into account,
// the left and right are ignored.
void scrollImage(int lines, const QRect &screenWindowRegion);
void calcGeometry();
void propagateSize();
void updateImageSize();
......@@ -752,7 +710,6 @@ private:
bool _showTerminalSizeHint;
bool _bidiEnabled;
bool _usesMouseTracking;
bool _alternateScrolling;
bool _bracketedPasteMode;
QPoint _iPntSel; // initial selection point
......@@ -768,9 +725,6 @@ private:
bool _copyTextAsHTML;
Enum::MiddleClickPasteModeEnum _middleClickPasteMode;
QScrollBar *_scrollBar;
Enum::ScrollBarPositionEnum _scrollbarLocation;
bool _scrollFullPage;
QString _wordCharacters;
int _bellMode;
......@@ -883,7 +837,9 @@ private:
int _displayVerticalLineAtChar;
QKeySequence _peekPrimaryShortcut;
TerminalPainter *_terminalPainter;
TerminalScrollBar *_scrollBar;
};
}
......
src/terminalDisplay/TerminalPainter.cpp
View file @ 379327b6
......@@ -24,6 +24,7 @@
// Konsole
#include "TerminalDisplay.h"
#include "TerminalScrollBar.hpp"
#include "ExtendedCharTable.h"
#include "LineBlockCharacters.h"
......@@ -292,11 +293,11 @@ namespace Konsole
QRegion TerminalPainter::highlightScrolledLinesRegion(bool nothingChanged)
{
QRegion dirtyRegion;
const int highlightLeftPosition = _display->scrollBarPosition() == Enum::ScrollBarLeft ? _display->_scrollBar->width() : 0;
const int highlightLeftPosition = _display->scrollBar()->scrollBarPosition() == Enum::ScrollBarLeft ? _display->scrollBar()->width() : 0;
int start = 0;
int nb_lines = abs(_display->_screenWindow->scrollCount());
if (nb_lines > 0 && _display->_scrollBar->maximum() > 0) {
if (nb_lines > 0 && _display->scrollBar()->maximum() > 0) {
QRect new_highlight;