#ifndef CODEEDITOR_H
#define CODEEDITOR_H

#include <QPlainTextEdit>
#include <set>

class CodeEditor : public QPlainTextEdit
{
	Q_OBJECT
public:
	explicit CodeEditor(QWidget *parent = nullptr);

	void gutterAreaPaintEvent(QPaintEvent *event);
	int gutterAreaWidth();

	void addErrorMarker(int position, int length);
	void clearErrorMarkers();
protected:
	void resizeEvent(QResizeEvent *event) override;

signals:

public slots:

private slots:
	void updateGutterAreaWidth(int newBlockCount);
	void highlightCurrentLine();
	void updateGutterArea(const QRect &, int);
	void onTextChanged();

private:
	QWidget *gutterArea;

	QTextEdit::ExtraSelection currentLine;
	QList<QTextEdit::ExtraSelection> errorMarkers;

	std::set<int> errorLines;

	void updateExtraSelections();
};

#endif // CODEEDITOR_H