Class FormatRangeHelper

src/difftextwindow.cpp:955–1006

}

class FormatRangeHelper
{
  private:
    QFont m_font;
    QPen m_pen;
    QColor m_background;
    qint32 m_currentPos;

    QVector<QTextLayout::FormatRange> m_formatRanges;

  public:
    inline operator QVector<QTextLayout::FormatRange>() { return m_formatRanges; }
    FormatRangeHelper()
    {
        m_pen = QColor(Qt::black);
        m_background = QColor(Qt::white);
        m_currentPos = 0;
    }

    void setFont(const QFont& f)
    {
        m_font = f;
    }

    void setPen(const QPen& pen)
    {
        m_pen = pen;
    }

    void setBackground(const QColor& background)
    {
        m_background = background;
    }

    void next()
    {
        if(m_formatRanges.isEmpty() || m_formatRanges.back().format.foreground().color() != m_pen.color() || m_formatRanges.back().format.background().color() != m_background)
        {
            QTextLayout::FormatRange fr;
            fr.length = 1;
            fr.start = m_currentPos;
            fr.format.setForeground(m_pen.color());
            fr.format.setBackground(m_background);
            m_formatRanges.append(fr);
        }
        else
        {
            ++m_formatRanges.back().length;
        }
        ++m_currentPos;
    }
};

void DiffTextWindowData::prepareTextLayout(QTextLayout& textLayout, qint32 visibleTextWidth)
{