qt-creator/src/plugins/diffeditor/selectabletexteditorwidget.h

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#ifndef SELECTABLETEXTEDITORWIDGET_H
#define SELECTABLETEXTEDITORWIDGET_H

#include <texteditor/texteditor.h>

namespace DiffEditor {
namespace Internal {

class DiffSelection
{
public:
    DiffSelection() : start(-1), end(-1), format(0) {}
    DiffSelection(QTextCharFormat *f) : start(-1), end(-1), format(f) {}
    DiffSelection(int s, int e, QTextCharFormat *f) : start(s), end(e), format(f) {}

    int start;
    int end;
    QTextCharFormat *format;
};

class SelectableTextEditorWidget : public TextEditor::TextEditorWidget
{
    Q_OBJECT
public:
    SelectableTextEditorWidget(Core::Id id, QWidget *parent = 0);
    ~SelectableTextEditorWidget() override;
    void setSelections(const QMap<int, QList<DiffSelection> > &selections);

private:
    void paintBlock(QPainter *painter,
                    const QTextBlock &block,
                    const QPointF &offset,
                    const QVector<QTextLayout::FormatRange> &selections,
                    const QRect &clipRect) const override;

    // block number, list of ranges
    // DiffSelection.start - can be -1 (continues from the previous line)
    // DiffSelection.end - can be -1 (spans to the end of line, even after the last character in line)
    QMap<int, QList<DiffSelection> > m_diffSelections;
};

} // namespace Internal
} // namespace DiffEditor

#endif // SELECTABLETEXTEDITORWIDGET_H