#include <QApplication>
#include <QTextListFormat>
#include <QTextEdit>
#include <QKeyEvent>
#include <QtGlobal>
#include <QTextList>
#include <QDebug>

#include <iostream>


class Editor : public QTextEdit {
public:
    Editor() {
        auto cursor = textCursor();

        QTextListFormat fmt;
        fmt.setStyle(QTextListFormat::ListDecimal);
        cursor.createList(fmt);
        cursor.insertText("Line one\nLine two");
    };

protected:
    void keyPressEvent(QKeyEvent* event) {
        if (event->key() == Qt::Key_F8) {
            auto cursor = textCursor();

            auto list = cursor.currentList();
            auto fmt = list->format();

            fmt.setIndent(fmt.indent() + 1);
            cursor.createList(fmt);

            qDebug().noquote() << toHtml();
        } else if (event->key() == Qt::Key_F9) {
            auto cursor = textCursor();

            cursor.insertBlock();
            cursor.movePosition(QTextCursor::PreviousBlock);

            auto list = cursor.currentList();
            auto fmt = list->format();

            fmt.setIndent(fmt.indent() + 1);
            auto new_list = cursor.createList(fmt);

            qDebug().noquote() << toHtml();

            cursor.movePosition(QTextCursor::NextBlock);
            new_list->add(cursor.block());

            qDebug().noquote() << toHtml();
        } else {
            QTextEdit::keyPressEvent(event);
        }
    }
};

int main(int argc, char* argv[]) {
    QApplication app(argc, argv);

    Editor editor;
    editor.show();

    return app.exec();
}