File indexing completed on 2024-05-12 09:48:32

 /*
     SPDX-FileCopyrightText: 2001-2009 Otto Bruggeman <bruggie@gmail.com>
     SPDX-FileCopyrightText: 2001-2003 John Firebaugh <jfirebaugh@kde.org>
     SPDX-FileCopyrightText: 2004 Jeff Snyder <jeff@caffeinated.me.uk>
     SPDX-FileCopyrightText: 2007-2012 Kevin Kofler <kevin.kofler@chello.at>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "komparelistview.h"
 
 #include <QStyle>
 #include <QPainter>
 #include <QTimer>
 #include <QResizeEvent>
 #include <QMouseEvent>
 #include <QWheelEvent>
 #include <QScrollBar>
 
 #include <KSharedConfig>
 
 #include <KompareDiff2/DiffModel>
 #include <KompareDiff2/DiffHunk>
 #include <KompareDiff2/Difference>
 #include <KompareDiff2/KompareModelList>
 
 #include <komparepartdebug.h>
 #include "viewsettings.h"
 #include "komparesplitter.h"
 
 #define COL_LINE_NO      0
 #define COL_MAIN         1
 
 #define BLANK_LINE_HEIGHT 3
 #define HUNK_LINE_HEIGHT  5
 
 #define ITEM_MARGIN 3
 
 using namespace Diff2;
 
 KompareListViewFrame::KompareListViewFrame(bool isSource,
                                            ViewSettings* settings,
                                            KompareSplitter* parent,
                                            const char* name):
     QFrame(parent),
     m_view(isSource, settings, this, name),
     m_label(isSource ? QStringLiteral("Source") : QStringLiteral("Dest"), this),
     m_layout(this)
 {
     setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored));
     m_label.setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed));
     QFrame* bottomLine = new QFrame(this);
     bottomLine->setFrameShape(QFrame::HLine);
     bottomLine->setFrameShadow(QFrame::Plain);
     bottomLine->setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed));
     bottomLine->setFixedHeight(1);
     m_label.setMargin(3);
     m_layout.setSpacing(0);
     m_layout.setContentsMargins(0, 0, 0, 0);
     m_layout.addWidget(&m_label);
     m_layout.addWidget(bottomLine);
     m_layout.addWidget(&m_view);
 
     connect(&m_view, &KompareListView::differenceClicked,
             parent, &KompareSplitter::slotDifferenceClicked);
 
     connect(parent, &KompareSplitter::scrollViewsToId, &m_view, &KompareListView::scrollToId);
     connect(parent, &KompareSplitter::setXOffset, &m_view, &KompareListView::setXOffset);
     connect(&m_view, &KompareListView::resized, parent, &KompareSplitter::slotUpdateScrollBars);
 }
 
 void KompareListViewFrame::slotSetModel(const DiffModel* model)
 {
     if (model)
     {
         if (view()->isSource()) {
             if (!model->sourceRevision().isEmpty())
                 m_label.setText(model->sourceFile() + QLatin1String(" (") + model->sourceRevision() + QLatin1Char(')'));
             else
                 m_label.setText(model->sourceFile());
         } else {
             if (!model->destinationRevision().isEmpty())
                 m_label.setText(model->destinationFile() + QLatin1String(" (") + model->destinationRevision() + QLatin1Char(')'));
             else
                 m_label.setText(model->destinationFile());
         }
     } else {
         m_label.setText(QString());
     }
 }
 
 KompareListView::KompareListView(bool isSource,
                                  ViewSettings* settings,
                                  QWidget* parent, const char* name) :
     QTreeWidget(parent),
     m_isSource(isSource),
     m_settings(settings),
     m_scrollId(-1),
     m_selectedModel(nullptr),
     m_selectedDifference(nullptr)
 {
     setObjectName(QLatin1String(name));
     setItemDelegate(new KompareListViewItemDelegate(this));
     setHeaderHidden(true);
     setColumnCount(3);   // Line Number, Main, Blank
     setAllColumnsShowFocus(true);
     setRootIsDecorated(false);
     setIndentation(0);
     setFrameStyle(QFrame::NoFrame);
     setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setFocusPolicy(Qt::NoFocus);
     setFont(m_settings->m_font);
     setFocusProxy(parent->parentWidget());
 }
 
 KompareListView::~KompareListView()
 {
     m_settings = nullptr;
     m_selectedModel = nullptr;
     m_selectedDifference = nullptr;
 }
 
 KompareListViewItem* KompareListView::itemAtIndex(int i)
 {
     return m_items[ i ];
 }
 
 int KompareListView::firstVisibleDifference()
 {
     QTreeWidgetItem* item = itemAt(QPoint(0, 0));
 
     if (item == nullptr)
     {
         qCDebug(KOMPAREPART) << "no item at viewport coordinates (0,0)" ;
     }
 
     while (item) {
         KompareListViewLineItem* lineItem = dynamic_cast<KompareListViewLineItem*>(item);
         if (lineItem && lineItem->diffItemParent()->difference()->type() != Difference::Unchanged)
             break;
         item = itemBelow(item);
     }
 
     if (item)
         return m_items.indexOf(((KompareListViewLineItem*)item)->diffItemParent());
 
     return -1;
 }
 
 int KompareListView::lastVisibleDifference()
 {
     QTreeWidgetItem* item = itemAt(QPoint(0, visibleHeight() - 1));
 
     if (item == nullptr)
     {
         qCDebug(KOMPAREPART) << "no item at viewport coordinates (0," << visibleHeight() - 1 << ")" ;
         // find last item
         item = itemAt(QPoint(0, 0));
         if (item) {
             QTreeWidgetItem* nextItem = item;
             do {
                 item = nextItem;
                 nextItem = itemBelow(item);
             } while (nextItem);
         }
     }
 
     while (item) {
         KompareListViewLineItem* lineItem = dynamic_cast<KompareListViewLineItem*>(item);
         if (lineItem && lineItem->diffItemParent()->difference()->type() != Difference::Unchanged)
             break;
         item = itemAbove(item);
     }
 
     if (item)
         return m_items.indexOf(((KompareListViewLineItem*)item)->diffItemParent());
 
     return -1;
 }
 
 QRect KompareListView::totalVisualItemRect(QTreeWidgetItem* item)
 {
     QRect total = visualItemRect(item);
     int n = item->childCount();
     for (int i = 0; i < n; ++i) {
         QTreeWidgetItem* child = item->child(i);
         if (!child->isHidden())
             total = total.united(totalVisualItemRect(child));
     }
     return total;
 }
 
 QRect KompareListView::itemRect(int i)
 {
     QTreeWidgetItem* item = itemAtIndex(i);
     return totalVisualItemRect(item);
 }
 
 int KompareListView::minScrollId()
 {
     return visibleHeight() / 2;
 }
 
 int KompareListView::maxScrollId()
 {
     int n = topLevelItemCount();
     if (!n) return 0;
     KompareListViewItem* item = (KompareListViewItem*)topLevelItem(n - 1);
     int maxId = item->scrollId() + item->maxHeight() - minScrollId();
     qCDebug(KOMPAREPART) << "Max ID = " << maxId ;
     return maxId;
 }
 
 int KompareListView::contentsHeight()
 {
     return verticalScrollBar()->maximum() + viewport()->height() - style()->pixelMetric(QStyle::PM_ScrollBarExtent);
 }
 
 int KompareListView::contentsWidth()
 {
     return (columnWidth(COL_LINE_NO) + columnWidth(COL_MAIN));
 }
 
 int KompareListView::visibleHeight()
 {
     return viewport()->height();
 }
 
 int KompareListView::visibleWidth()
 {
     return viewport()->width();
 }
 
 int KompareListView::contentsX()
 {
     return horizontalOffset();
 }
 
 int KompareListView::contentsY()
 {
     return verticalOffset();
 }
 
 int KompareListView::nextPaintOffset() const
 {
     return m_nextPaintOffset;
 }
 
 void KompareListView::setNextPaintOffset(int offset)
 {
     m_nextPaintOffset = offset;
 }
 
 void KompareListView::setXOffset(int x)
 {
     qCDebug(KOMPAREPART) << "SetXOffset : Scroll to x position: " << x ;
     horizontalScrollBar()->setValue(x);
 }
 
 void KompareListView::scrollToId(int id)
 {
 //     qCDebug(KOMPAREPART) << "ScrollToID : Scroll to id : " << id ;
     int n = topLevelItemCount();
     KompareListViewItem* item = nullptr;
     if (n) {
         int i = 1;
         for (; i < n; ++i) {
             if (((KompareListViewItem*)topLevelItem(i))->scrollId() > id)
                 break;
         }
         item = (KompareListViewItem*)topLevelItem(i - 1);
     }
 
     if (item) {
         QRect rect = totalVisualItemRect(item);
         int pos = rect.top() + verticalOffset();
         int itemId = item->scrollId();
         int height = rect.height();
         double r = (double)(id - itemId) / (double)item->maxHeight();
         int y = pos + (int)(r * (double)height) - minScrollId();
 //         qCDebug(KOMPAREPART) << "scrollToID: " ;
 //         qCDebug(KOMPAREPART) << "            id = " << id ;
 //         qCDebug(KOMPAREPART) << "           pos = " << pos ;
 //         qCDebug(KOMPAREPART) << "        itemId = " << itemId ;
 //         qCDebug(KOMPAREPART) << "             r = " << r ;
 //         qCDebug(KOMPAREPART) << "        height = " << height ;
 //         qCDebug(KOMPAREPART) << "         minID = " << minScrollId() ;
 //         qCDebug(KOMPAREPART) << "             y = " << y ;
 //         qCDebug(KOMPAREPART) << "contentsHeight = " << contentsHeight() ;
 //         qCDebug(KOMPAREPART) << "         c - y = " << contentsHeight() - y ;
         verticalScrollBar()->setValue(y);
     }
 
     m_scrollId = id;
 }
 
 int KompareListView::scrollId()
 {
     if (m_scrollId < 0)
         m_scrollId = minScrollId();
     return m_scrollId;
 }
 
 void KompareListView::setSelectedDifference(const Difference* diff, bool scroll)
 {
     qCDebug(KOMPAREPART) << "KompareListView::setSelectedDifference(" << diff << ", " << scroll << ")" ;
 
     // When something other than a click causes this function to be called,
     // it'll only get called once, and all is simple.
     //
     // When the user clicks on a diff, this function will get called once when
     // komparesplitter::slotDifferenceClicked runs, and again when the
     // setSelection signal from the modelcontroller arrives.
     //
     // the first call (which will always be from the splitter) will have
     // scroll==false, and the second call will bail out here.
     // Which is why clicking on a difference does not cause the listviews to
     // scroll.
     if (m_selectedDifference == diff)
         return;
 
     m_selectedDifference = diff;
 
     KompareListViewItem* item = m_itemDict[ diff ];
     if (!item) {
         qCDebug(KOMPAREPART) << "KompareListView::slotSetSelection(): couldn't find our selection!" ;
         return;
     }
 
     // why does this not happen when the user clicks on a diff? see the comment above.
     if (scroll)
         scrollToId(item->scrollId());
     setUpdatesEnabled(false);
     int x = horizontalScrollBar()->value();
     int y = verticalScrollBar()->value();
     setCurrentItem(item);
     horizontalScrollBar()->setValue(x);
     verticalScrollBar()->setValue(y);
     setUpdatesEnabled(true);
 }
 
 void KompareListView::slotSetSelection(const Difference* diff)
 {
     qCDebug(KOMPAREPART) << "KompareListView::slotSetSelection( const Difference* diff )" ;
 
     setSelectedDifference(diff, true);
 }
 
 void KompareListView::slotSetSelection(const DiffModel* model, const Difference* diff)
 {
     qCDebug(KOMPAREPART) << "KompareListView::slotSetSelection( const DiffModel* model, const Difference* diff )" ;
 
     if (m_selectedModel && m_selectedModel == model) {
         slotSetSelection(diff);
         return;
     }
 
     clear();
     m_items.clear();
     m_itemDict.clear();
     m_selectedModel = model;
 
     DiffHunkListConstIterator hunkIt = model->hunks()->begin();
     DiffHunkListConstIterator hEnd   = model->hunks()->end();
 
     KompareListViewItem* item = nullptr;
     m_nextPaintOffset = 0;
 
     for (; hunkIt != hEnd; ++hunkIt)
     {
         if (item)
             item = new KompareListViewHunkItem(this, item, *hunkIt, model->isBlended());
         else
             item = new KompareListViewHunkItem(this, *hunkIt, model->isBlended());
 
         DifferenceListConstIterator diffIt = (*hunkIt)->differences().begin();
         DifferenceListConstIterator dEnd   = (*hunkIt)->differences().end();
 
         for (; diffIt != dEnd; ++diffIt)
         {
             item = new KompareListViewDiffItem(this, item, *diffIt);
 
             int type = (*diffIt)->type();
 
             if (type != Difference::Unchanged)
             {
                 m_items.append((KompareListViewDiffItem*)item);
                 m_itemDict.insert(*diffIt, (KompareListViewDiffItem*)item);
             }
         }
     }
 
     resizeColumnToContents(COL_LINE_NO);
     resizeColumnToContents(COL_MAIN);
 
     slotSetSelection(diff);
 }
 
 KompareListViewDiffItem* KompareListView::diffItemAt(const QPoint& pos)
 {
     KompareListViewItem* item = static_cast<KompareListViewItem*>(itemAt(pos));
     if (!item)
         return nullptr;
     switch (item->type()) {
         case KompareListViewItem::Hunk:
             if (item->paintHeight()) return nullptr;  // no diff item here
             // zero height (fake 1 pixel height), so a diff item shines through
             return static_cast<KompareListViewDiffItem*>(itemBelow(item));
         case KompareListViewItem::Line:
         case KompareListViewItem::Blank:
             return static_cast<KompareListViewLineItem*>(item)->diffItemParent();
         case KompareListViewItem::Container:
             return static_cast<KompareListViewLineContainerItem*>(item)->diffItemParent();
         case KompareListViewItem::Diff:
             return static_cast<KompareListViewDiffItem*>(item);
         default:
             return nullptr;
     }
 }
 
 void KompareListView::mousePressEvent(QMouseEvent* e)
 {
     QPoint vp = e->pos();
     KompareListViewDiffItem* diffItem = diffItemAt(vp);
     if (diffItem && diffItem->difference()->type() != Difference::Unchanged) {
         Q_EMIT differenceClicked(diffItem->difference());
     }
 }
 
 void KompareListView::mouseDoubleClickEvent(QMouseEvent* e)
 {
     QPoint vp = e->pos();
     KompareListViewDiffItem* diffItem = diffItemAt(vp);
     if (diffItem && diffItem->difference()->type() != Difference::Unchanged) {
         // FIXME: make a new signal that does both
         Q_EMIT differenceClicked(diffItem->difference());
         Q_EMIT applyDifference(!diffItem->difference()->applied());
     }
 }
 
 void KompareListView::renumberLines()
 {
 //     qCDebug(KOMPAREPART) << "Begin" ;
     unsigned int newLineNo = 1;
     if (!topLevelItemCount()) return;
     KompareListViewItem* item = (KompareListViewItem*)topLevelItem(0);
     while (item) {
 //         qCDebug(KOMPAREPART) << "type: " << item->type() ;
         if (item->type() != KompareListViewItem::Container
                 && item->type() != KompareListViewItem::Blank
                 && item->type() != KompareListViewItem::Hunk)
         {
 //             qCDebug(KOMPAREPART) << QString::number( newLineNo ) ;
             item->setText(COL_LINE_NO, QString::number(newLineNo++));
         }
         item = (KompareListViewItem*)itemBelow(item);
     }
 }
 
 void KompareListView::slotApplyDifference(bool apply)
 {
     m_itemDict[ m_selectedDifference ]->applyDifference(apply);
     // now renumber the line column if this is the destination
     if (!m_isSource)
         renumberLines();
 }
 
 void KompareListView::slotApplyAllDifferences(bool apply)
 {
     QHash<const Diff2::Difference*, KompareListViewDiffItem*>::ConstIterator it = m_itemDict.constBegin();
     QHash<const Diff2::Difference*, KompareListViewDiffItem*>::ConstIterator end = m_itemDict.constEnd();
     for (; it != end; ++it)
         it.value()->applyDifference(apply);
 
     // now renumber the line column if this is the destination
     if (!m_isSource)
         renumberLines();
     update();
 }
 
 void KompareListView::slotApplyDifference(const Difference* diff, bool apply)
 {
     m_itemDict[ diff ]->applyDifference(apply);
     // now renumber the line column if this is the destination
     if (!m_isSource)
         renumberLines();
 }
 
 void KompareListView::wheelEvent(QWheelEvent* e)
 {
     e->ignore(); // we want the parent to catch wheel events
 }
 
 void KompareListView::resizeEvent(QResizeEvent* e)
 {
     QTreeWidget::resizeEvent(e);
     Q_EMIT resized();
 }
 
 KompareListViewItemDelegate::KompareListViewItemDelegate(QObject* parent)
     : QStyledItemDelegate(parent)
 {
 }
 
 KompareListViewItemDelegate::~KompareListViewItemDelegate()
 {
 }
 
 void KompareListViewItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
 {
     int column = index.column();
     QStyleOptionViewItem changedOption = option;
     if (column == COL_LINE_NO)
         changedOption.displayAlignment = Qt::AlignRight;
     KompareListViewItem* item = static_cast<KompareListViewItem*>(static_cast<KompareListView*>(parent())->itemFromIndex(index));
     item->paintCell(painter, changedOption, column);
 }
 
 QSize KompareListViewItemDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
 {
     KompareListViewItem* item = static_cast<KompareListViewItem*>(static_cast<KompareListView*>(parent())->itemFromIndex(index));
     QSize hint = QStyledItemDelegate::sizeHint(option, index);
     return QSize(hint.width() + ITEM_MARGIN, item->height());
 }
 
 KompareListViewItem::KompareListViewItem(KompareListView* parent, int type)
     : QTreeWidgetItem(parent, type),
       m_scrollId(0),
       m_height(0),
       m_paintHeight(0),
       m_paintOffset(parent->nextPaintOffset())
 {
 //     qCDebug(KOMPAREPART) << "Created KompareListViewItem with scroll id " << m_scrollId ;
 }
 
 KompareListViewItem::KompareListViewItem(KompareListView* parent, KompareListViewItem* after, int type)
     : QTreeWidgetItem(parent, after, type),
       m_scrollId(after->scrollId() + after->maxHeight()),
       m_height(0),
       m_paintHeight(0),
       m_paintOffset(parent->nextPaintOffset())
 {
 //     qCDebug(KOMPAREPART) << "Created KompareListViewItem with scroll id " << m_scrollId ;
 }
 
 KompareListViewItem::KompareListViewItem(KompareListViewItem* parent, int type)
     : QTreeWidgetItem(parent, type),
       m_scrollId(0),
       m_height(0),
       m_paintHeight(0),
       m_paintOffset(parent->kompareListView()->nextPaintOffset())
 {
 }
 
 KompareListViewItem::KompareListViewItem(KompareListViewItem* parent, KompareListViewItem* /*after*/, int type)
     : QTreeWidgetItem(parent, type),
       m_scrollId(0),
       m_height(0),
       m_paintHeight(0),
       m_paintOffset(parent->kompareListView()->nextPaintOffset())
 {
 }
 
 int KompareListViewItem::height() const
 {
     return m_height;
 }
 
 void KompareListViewItem::setHeight(int h)
 {
     m_height = m_paintHeight = h;
     // QTreeWidget doesn't like zero height, fudge around it.
     m_height -= m_paintOffset;
     if (m_height <= 0) {
         kompareListView()->setNextPaintOffset(1 - m_height);
         m_height = 1;
     } else kompareListView()->setNextPaintOffset(0);
 }
 
 int KompareListViewItem::paintHeight() const
 {
     return m_paintHeight;
 }
 
 int KompareListViewItem::paintOffset() const
 {
     return m_paintOffset;
 }
 
 bool KompareListViewItem::isCurrent() const
 {
     return treeWidget()->currentItem() == this;
 }
 
 KompareListView* KompareListViewItem::kompareListView() const
 {
     return (KompareListView*)treeWidget();
 }
 
 void KompareListViewItem::paintCell(QPainter* p, const QStyleOptionViewItem& option, int column)
 {
     // Default implementation for zero-height items.
     // We have to paint the item which shines through or we'll end up with glitches.
     KompareListViewItem* nextItem = (KompareListViewItem*)kompareListView()->itemBelow(this);
     if (nextItem) {
         QStyleOptionViewItem changedOption = option;
         changedOption.rect.translate(0, height());
         nextItem->paintCell(p, changedOption, column);
     }
 }
 
 KompareListViewDiffItem::KompareListViewDiffItem(KompareListView* parent, Difference* difference)
     : KompareListViewItem(parent, Diff),
       m_difference(difference),
       m_sourceItem(nullptr),
       m_destItem(nullptr)
 {
     init();
 }
 
 KompareListViewDiffItem::KompareListViewDiffItem(KompareListView* parent, KompareListViewItem* after, Difference* difference)
     : KompareListViewItem(parent, after, Diff),
       m_difference(difference),
       m_sourceItem(nullptr),
       m_destItem(nullptr)
 {
     init();
 }
 
 KompareListViewDiffItem::~KompareListViewDiffItem()
 {
     m_difference = nullptr;
 }
 
 void KompareListViewDiffItem::init()
 {
     setHeight(0);
     setExpanded(true);
     int nextPaintOffset = kompareListView()->nextPaintOffset();
     m_destItem = new KompareListViewLineContainerItem(this, false);
     kompareListView()->setNextPaintOffset(nextPaintOffset);
     m_sourceItem = new KompareListViewLineContainerItem(this, true);
     setVisibility();
 }
 
 void KompareListViewDiffItem::setVisibility()
 {
     m_sourceItem->setHidden(!(kompareListView()->isSource() || m_difference->applied()));
     m_destItem->setHidden(!m_sourceItem->isHidden());
 }
 
 void KompareListViewDiffItem::applyDifference(bool apply)
 {
     qCDebug(KOMPAREPART) << "KompareListViewDiffItem::applyDifference( " << apply << " )" ;
     setVisibility();
 }
 
 int KompareListViewDiffItem::maxHeight()
 {
     int lines = qMax(m_difference->sourceLineCount(), m_difference->destinationLineCount());
     if (lines == 0)
         return BLANK_LINE_HEIGHT;
     else
         return lines * treeWidget()->fontMetrics().height();
 }
 
 KompareListViewLineContainerItem::KompareListViewLineContainerItem(KompareListViewDiffItem* parent, bool isSource)
     : KompareListViewItem(parent, Container),
       m_blankLineItem(nullptr),
       m_isSource(isSource)
 {
 //     qCDebug(KOMPAREPART) << "isSource ? " << (isSource ? " Yes!" : " No!") ;
     setHeight(0);
     setExpanded(true);
 
     int lines = lineCount();
     int line = lineNumber();
 //     qCDebug(KOMPAREPART) << "LineNumber : " << lineNumber() ;
     if (lines == 0) {
         m_blankLineItem = new KompareListViewBlankLineItem(this);
         return;
     }
 
     for (int i = 0; i < lines; ++i, ++line) {
         new KompareListViewLineItem(this, line, lineAt(i));
     }
 }
 
 KompareListViewLineContainerItem::~KompareListViewLineContainerItem()
 {
 }
 
 KompareListViewDiffItem* KompareListViewLineContainerItem::diffItemParent() const
 {
     return (KompareListViewDiffItem*)parent();
 }
 
 int KompareListViewLineContainerItem::lineCount() const
 {
     return m_isSource ? diffItemParent()->difference()->sourceLineCount() :
            diffItemParent()->difference()->destinationLineCount();
 }
 
 int KompareListViewLineContainerItem::lineNumber() const
 {
     return m_isSource ? diffItemParent()->difference()->sourceLineNumber() :
            diffItemParent()->difference()->destinationLineNumber();
 }
 
 DifferenceString* KompareListViewLineContainerItem::lineAt(int i) const
 {
     return m_isSource ? diffItemParent()->difference()->sourceLineAt(i) :
            diffItemParent()->difference()->destinationLineAt(i);
 }
 
 KompareListViewLineItem::KompareListViewLineItem(KompareListViewLineContainerItem* parent, int line, DifferenceString* text)
     : KompareListViewItem(parent, Line)
 {
     init(line, text);
 }
 
 KompareListViewLineItem::KompareListViewLineItem(KompareListViewLineContainerItem* parent, int line, DifferenceString* text, int type)
     : KompareListViewItem(parent, type)
 {
     init(line, text);
 }
 
 KompareListViewLineItem::~KompareListViewLineItem()
 {
     m_text = nullptr;
 }
 
 void KompareListViewLineItem::init(int line, DifferenceString* text)
 {
     setHeight(treeWidget()->fontMetrics().height());
     setText(COL_LINE_NO, QString::number(line));
     setText(COL_MAIN, text->string());
     m_text = text;
 }
 
 void KompareListViewLineItem::paintCell(QPainter* p, const QStyleOptionViewItem& option, int column)
 {
     int width = option.rect.width();
     Qt::Alignment align = option.displayAlignment;
 
     p->setRenderHint(QPainter::Antialiasing);
     p->translate(option.rect.topLeft());
     p->translate(0, -paintOffset());
 
     QColor bg(Qt::white);   // Always make the background white when it is not a real difference
     if (diffItemParent()->difference()->type() == Difference::Unchanged)
     {
         if (column == COL_LINE_NO)
         {
             bg = QColor(Qt::lightGray);
         }
     }
     else
     {
         bg = kompareListView()->settings()->colorForDifferenceType(
                  diffItemParent()->difference()->type(),
                  diffItemParent()->isCurrent(),
                  diffItemParent()->difference()->applied());
     }
 
     // Paint background
     p->fillRect(0, 0, width, paintHeight(), bg);
 
     // Paint foreground
     if (diffItemParent()->difference()->type() == Difference::Unchanged)
         p->setPen(QColor(Qt::darkGray));     // always make normal text gray
     else
         p->setPen(QColor(Qt::black));     // make text with changes black
 
     paintText(p, bg, column, width, align);
 
     // Paint darker lines around selected item
     if (diffItemParent()->isCurrent())
     {
         p->translate(0.5, 0.5);
         p->setPen(bg.darker(135));
         QTreeWidgetItem* parentItem = parent();
         if (this == parentItem->child(0))
             p->drawLine(0, 0, width, 0);
         if (this == parentItem->child(parentItem->childCount() - 1))
             p->drawLine(0, paintHeight() - 1, width, paintHeight() - 1);
     }
 
     p->resetTransform();
 }
 
 void KompareListViewLineItem::paintText(QPainter* p, const QColor& bg, int column, int width, int align)
 {
     if (column == COL_MAIN)
     {
         QString textChunk;
         int offset = ITEM_MARGIN;
         int prevValue = 0;
         int charsDrawn = 0;
         int chunkWidth;
         QBrush changeBrush(bg, Qt::Dense3Pattern);
         QBrush normalBrush(bg, Qt::SolidPattern);
         QBrush brush;
 
         if (m_text->string().isEmpty())
         {
             p->fillRect(0, 0, width, paintHeight(), normalBrush);
             return;
         }
 
         p->fillRect(0, 0, offset, paintHeight(), normalBrush);
 
         if (!m_text->markerList().isEmpty())
         {
             MarkerListConstIterator markerIt = m_text->markerList().begin();
             MarkerListConstIterator mEnd     = m_text->markerList().end();
             Marker* m = *markerIt;
 
             for (; markerIt != mEnd; ++markerIt)
             {
                 m  = *markerIt;
                 textChunk = m_text->string().mid(prevValue, m->offset() - prevValue);
 //                 qCDebug(KOMPAREPART) << "TextChunk   = \"" << textChunk << "\"" ;
 //                 qCDebug(KOMPAREPART) << "c->offset() = " << c->offset() ;
 //                 qCDebug(KOMPAREPART) << "prevValue   = " << prevValue ;
                 expandTabs(textChunk, kompareListView()->settings()->m_tabToNumberOfSpaces, charsDrawn);
                 charsDrawn += textChunk.length();
                 prevValue = m->offset();
                 if (m->type() == Marker::End)
                 {
                     QFont font(p->font());
                     font.setBold(true);
                     p->setFont(font);
 //                     p->setPen( Qt::blue );
                     brush = changeBrush;
                 }
                 else
                 {
                     QFont font(p->font());
                     font.setBold(false);
                     p->setFont(font);
 //                     p->setPen( Qt::black );
                     brush = normalBrush;
                 }
                 chunkWidth = p->fontMetrics().horizontalAdvance(textChunk);
                 p->fillRect(offset, 0, chunkWidth, paintHeight(), brush);
                 p->drawText(offset, 0,
                             chunkWidth, paintHeight(),
                             align, textChunk);
                 offset += chunkWidth;
             }
         }
         if (prevValue < m_text->string().length())
         {
             // Still have to draw some string without changes
             textChunk = m_text->string().mid(prevValue, qMax(1, m_text->string().length() - prevValue));
             expandTabs(textChunk, kompareListView()->settings()->m_tabToNumberOfSpaces, charsDrawn);
 //             qCDebug(KOMPAREPART) << "TextChunk   = \"" << textChunk << "\"" ;
             QFont font(p->font());
             font.setBold(false);
             p->setFont(font);
             chunkWidth = p->fontMetrics().horizontalAdvance(textChunk);
             p->fillRect(offset, 0, chunkWidth, paintHeight(), normalBrush);
             p->drawText(offset, 0,
                         chunkWidth, paintHeight(),
                         align, textChunk);
             offset += chunkWidth;
         }
         p->fillRect(offset, 0, width - offset, paintHeight(), normalBrush);
     }
     else
     {
         p->fillRect(0, 0, width, paintHeight(), bg);
         p->drawText(ITEM_MARGIN, 0,
                     width - ITEM_MARGIN, paintHeight(),
                     align, text(column));
     }
 }
 
 void KompareListViewLineItem::expandTabs(QString& text, int tabstop, int startPos) const
 {
     int index;
     while ((index = text.indexOf(QChar(9))) != -1)
         text.replace(index, 1, QString(tabstop - ((startPos + index) % tabstop), QLatin1Char(' ')));
 }
 
 KompareListViewDiffItem* KompareListViewLineItem::diffItemParent() const
 {
     KompareListViewLineContainerItem* p = (KompareListViewLineContainerItem*)parent();
     return p->diffItemParent();
 }
 
 KompareListViewBlankLineItem::KompareListViewBlankLineItem(KompareListViewLineContainerItem* parent)
     : KompareListViewLineItem(parent, 0, new DifferenceString(), Blank)
 {
     setHeight(BLANK_LINE_HEIGHT);
 }
 
 void KompareListViewBlankLineItem::paintText(QPainter* p, const QColor& bg, int column, int width, int /* align */)
 {
     if (column == COL_MAIN)
     {
         QBrush normalBrush(bg, Qt::SolidPattern);
         p->fillRect(0, 0, width, paintHeight(), normalBrush);
     }
 }
 
 KompareListViewHunkItem::KompareListViewHunkItem(KompareListView* parent, DiffHunk* hunk, bool zeroHeight)
     : KompareListViewItem(parent, Hunk),
       m_zeroHeight(zeroHeight),
       m_hunk(hunk)
 {
     setHeight(maxHeight());
     setFlags(flags() & ~Qt::ItemIsSelectable);
 }
 
 KompareListViewHunkItem::KompareListViewHunkItem(KompareListView* parent, KompareListViewItem* after, DiffHunk* hunk,  bool zeroHeight)
     : KompareListViewItem(parent, after, Hunk),
       m_zeroHeight(zeroHeight),
       m_hunk(hunk)
 {
     setHeight(maxHeight());
     setFlags(flags() & ~Qt::ItemIsSelectable);
 }
 
 KompareListViewHunkItem::~KompareListViewHunkItem()
 {
     m_hunk = nullptr;
 }
 
 int KompareListViewHunkItem::maxHeight()
 {
     if (m_zeroHeight) {
         return 0;
     } else if (m_hunk->function().isEmpty()) {
         return HUNK_LINE_HEIGHT;
     } else {
         return treeWidget()->fontMetrics().height();
     }
 }
 
 void KompareListViewHunkItem::paintCell(QPainter* p, const QStyleOptionViewItem& option, int column)
 {
     if (m_zeroHeight) {
         KompareListViewItem::paintCell(p, option, column);
     } else {
         int x = option.rect.left();
         int y = option.rect.top() - paintOffset();
         int width = option.rect.width();
         Qt::Alignment align = option.displayAlignment;
 
         p->fillRect(x, y, width, paintHeight(), QColor(Qt::lightGray));     // Hunk headers should be lightgray
         p->setPen(QColor(Qt::black));     // Text color in hunk should be black
         if (column == COL_MAIN) {
             p->drawText(x + ITEM_MARGIN, y, width - ITEM_MARGIN, paintHeight(),
                         align, m_hunk->function());
         }
     }
 }
 
 #include "moc_komparelistview.cpp"